Aaron O'Neill
Research expert covering historical data
Detailed statistics
Gun ownership in the U.S. 1972-2023
Detailed statistics
U.S. public opinion on a law that bans private handgun possession 1959-2023
Detailed statistics
Number of mass shooting victims in the U.S. and other developed countries 1998-2019
Number of mass shooting victims in the U.S. and other developed countries 1998-2019
Comparison of the annual number of mass shooting casualties in the United States and all other developed countries combined from 1998 to 2019
U.S. voters support for stricter gun laws after mass shootings, 2022
Support for stricter gun laws after major mass shootings in the United States 2022
Share of mass public shooters U.S. 1999-2024, by location/relation to shooting site
Share of mass public shooters in the United States from 1966 to January 2024, by location and existing relationship to the shooting site*
Leading gun control lobby organizations in the U.S., by amount spent 2022
Leading gun control lobby organizations in the United States in 2022, by amount spent (in 1,000 U.S. dollars)
Number of shooting incidents Japan 2017-2023, by firearm type
Number of gun shooting incidents in Japan from 2017 to 2023, by type of firearm
Number of injuries from shooting incidents Japan 2014-2023
Number of injuries resulting from gun shooting incidents in Japan from 2014 to 2023
Share of mass public shooters U.S. 1999-2024, by race and location of shooting
Share of mass public shooters in the United States from 1966 to January 2024, by race and location of shooting*
U.S. adults' support for various gun control measures 2022
Level of support for various gun control measures in the United States 2022
U.S. adults' support for various gun control measures by party 2022
Level of support for various gun control measures in the United States 2022, by party identification
U.S. spending on gun rights versus gun control lobbying 1998-2022
Funds spent on lobbying for gun control versus lobbying for gun rights in the United States from 1998 to 2022 (in U.S. dollars)
Number of fatalities from shooting incidents Japan 2014-2023
Number of fatalities resulting from gun shooting incidents in Japan from 2014 to 2023
U.S. support for stricter gun control laws 2023, by party
Do you support or oppose stricter gun control laws in the United States?
U.S. mass shooting victims, by fatalities and injuries 1982-2023
Number of victims of mass shootings in the United States between 1982 and December 2023
Worst mass shootings in the U.S., as of December 2023
Number of victims of the worst mass shootings in the United States between 1982 and December 2023
U.S. registered voters support for corporate response to shooting in Buffalo NY 2022
Support among adults in the United States for different corporate responses to the mass shooting in Buffalo, New York, in May 2022
Total federal drug control spending in the U.S. 2012-2025
Total federal drug control spending in the United States from FY 2012 to FY 2025 (in million U.S. dollars)
Americans on gun laws reducing the number of mass shootings 2017
If new gun control laws were passed, do you think it would reduce the number of mass shootings in the U.S.?
Frequency of weight control in Italy 2022, by body mass index
Share of individuals checking their weight in Italy in 2022, by body mass index and frequency
Annual share of AR-15 assault rifles in total U.S. firearm production 1990-2020
Annual share of AR-15 assault rifles in the total number of firearms manufactured in the United States from 1990 to 2020
Mass shootings in the U.S.: shooters by gender, as of December 2023
Number of mass shootings in the United States between 1982 and December 2023, by shooter's gender
Number of data compromises and impacted individuals in U.S. 2005-2023
Annual number of data compromises and individuals impacted in the United States from 2005 to 2023
U.S. gun laws 2024, by state
Gun laws in the United States in 2024, by state
Guns used in mass shootings in the U.S. 1982-2023
Weapon types used in mass shootings in the United States between 1982 and December 2023, by number of weapons and incidents
Leading states for gun law strength in the U.S. 2024
Leading states for gun law strength in the United States as of January 2024 (index score)
Number of data compromises in the U.S. healthcare sector 2005-2023
Total annual number of data compromises in the United States healthcare sector from 2005 to 2023
Drug control spending on treatment and prevention in the U.S. 2008-2025
Federal drug control spending on treatment and prevention in the United States from FY 2008 to FY 2025 (in million U.S. dollars)
Federal drug control spending in the U.S. in FY 2025 by function
Federal drug control spending in the United States in FY 2025, by function (in million U.S. dollars)
Share of college students who prefer select gun policies on campus U.S 2023, by party
Share of current and prospective college students who say they would be more likely stay enrolled or choose to enroll at a college with various restrictions on gun ownership in the United States in 2023, by party
Opinion on gun control strictness and number of mass shootings in the U.S. 2017
Opinion on the effect of inhibiting legal gun ownership on number of mass shootings in the United States as of 2017, by political party
Number of gun shooting incidents Japan 2014-2023
Number of reported incidents related to firing of firearms in Japan from 2014 to 2023
Global biggest data breaches 2023, by impact
Most significant incidents of data breach worldwide in 2023, by number of breached accounts (in millions)
Global markets with highest data breach density 2023
Markets with highest data breach density worldwide in 2023 (in breaches per 1,000 individuals)
Americans' fears of becoming a victim of a mass shooting 2015 & 2017
How worried are you that you or someone in your family will become a victim of a mass shooting?
Share of adults who think mass shootings reflect broader problems in society U.S 2023
Do you think mass shootings reflect broader problems in American society, or are they just the isolated acts of troubled individuals?
Share of U.S. adults with select opinions on mass shootings U.S. 2023
Do you think that mass shootings are something that can be stopped or are just a fact of life in the United States today?
Frequency of college students worrying about gun violence on campus U.S. 2023
Share of associate and bachelor's degree students who worry about gun violence on their college campus in the United States in 2023, by frequency
Current year in various historical and world calendars 2024
Current year according to various historical and world calendars, as of January 1. 2024
Mass shootings in the U.S. 1982-2023, by state
Number of mass shootings in the United States between 1982 and December 2023, by state
Mass shootings in the U.S. 1982-2023
Number of mass shootings in the United States between 1982 and December 2023
Share of data leaks in Russia 2023, by information type
Distribution of data leakage incidents in Russia in 2023, by information type
Mobile data and internet prices in Portugal 2021-2023, by basket
Mobile data and internet prices in Portugal from 2021 to 2023, by basket (in U.S. dollars)
Print personalizations' top 1st-party data sources for marketers in the U.S. 2024
Leading first-party data sources for print vendors' personalized communications according to marketers in the United States as of the 1st quarter of 2024
Distribution of data leaks in Russia 2023, by industry
Distribution of incidents related to leaks of confidential data of companies in the database format in Russia in 2023, by industry
Reasons to collect mobile app data from global iOS users 2024
Function of data collected by mobile app publishers via iOS apps from users worldwide as of March 2024
Ways of exercising data privacy rights among UK young adults 2023, by ethnicity
Most common ways of exercising data privacy rights among young adults in the United Kingdom (UK) as of October 2023, by ethnicity
Ways of exercising data privacy rights among UK adults 2023
Most common ways of exercising data privacy rights among adults in the United Kingdom (UK) as of October 2023
All-time biggest online data breaches 2024
Most significant cases of data breach worldwide as of January 2024 (in millions), by number of compromised data records and individuals impacted
Leading pest control companies in the U.S. 2022, based on revenue
Leading pest control companies in the United States in 2022, based on revenue (in million U.S. dollars)
Companies using big data South Korea 2022, by type of analyzed data
Usage of big data technology and services among companies in South Korea in 2022, by type of analyzed data
Global cases of sensitive data spill into ChatGPT 2023
Number of cases employees worldwide input sensitive data on ChatGPT from February to April 2023
Mon - Fri, 9am - 6pm (EST)
Mon - Fri, 9am - 5pm (SGT)
Mon - Fri, 10:00am - 6:00pm (JST)
Mon - Fri, 9:30am - 5pm (GMT)
Mon - Fri, 9am - 6pm (EST)