A pair of mass shootings left a total of 31 people dead and many others injured over the course of just 24 hours this weekend.

22 people were killed at a shooting at a Walmart in El Paso, Texas on Saturday, while nine others were killed at another shooting in Dayton, Ohio early Sunday morning.

The incidents come just days after three other people were killed at a shooting at a garlic festival in Gilroy, Calif.,

and nearly two years after a gunman opened fire from the 32nd floor of a Las Vegas hotel, killing 58 people and wounding another 422.

A database of mass shootings compiled by Mother Jones going back to 1982 counts 114 such incidents in which at least three people were killed,

not including the gunman.

In that time, 932 people have been killed and 1,406 wounded, including the numbers from the El Paso and Dayton incidents.

The following chart visualizes each mass shooting in terms of deaths and injuries.

TIME has examined each incident and slightly adjusted some values as the death toll and number of injured has been clarified over time.

Click an incident to see the details.

Victim counts do not include the perpetrator.

Most descriptions of events come from Mother Jones and are used with permission.

= Killed

= Wounded

 

2019: 57 killed, 78 wounded

Dayton, Ohio, Aug. 4

El Paso, Texas, Aug. 3

Gilroy, Calif., Jul. 28

Virginia Beach, Va., May. 31

Aurora, Ill., Feb. 15

State College, Pa., Jan. 24

Sebring, Fla., Jan. 23

2018: 80 killed, 66 wounded

Chicago, Ill., Nov. 19

Thousand Oaks, Calif., Nov. 7

Pittsburgh, Pa., Oct. 27

Perryman, Md., Sep. 20

Bakersfield, Calif., Sep. 12

Cincinnati, Ohio, Sep. 6

Annapolis, Md., Jun. 28

Santa Fe, Texas, May. 18

Nashville, Tenn., Apr. 22

Yountville, Calif., Mar. 9

Parkland, Fla., Feb. 14

Melcroft, Pa., Jan. 28

2017: 117 killed, 463 wounded

Rancho Tehama, Calif., Nov. 14

Sutherland Springs, Texas, Nov. 5

Thornton, Colo., Nov. 1

Edgewood, Md., Oct. 18

Las Vegas, Nev., Oct. 1

San Francisco, Calif., Jun. 14

Tunkhannock, Pa., Jun. 7

Orlando, Fla., Jun. 5

Kirkersville, Ohio, May. 12

Fresno, Calif., Apr. 18

Fort Lauderdale, Fla., Jan. 6

2016: 71 killed, 83 wounded

Burlington, Wash., Sep. 23

Baton Rouge, La., Jul. 17

Dallas, Texas, Jul. 7

Orlando, Fla., Jun. 12

Hesston, Kan., Feb. 25

Kalamazoo County, Miss., Feb. 20

2015: 46 killed, 43 wounded

San Bernardino, Calif., Dec. 2

Colorado Springs, Colo., Nov. 27

Colorado Springs, Colo., Oct. 31

Roseburg, Ore., Oct. 1

Chattanooga, Tenn., Jul. 16

Charleston, S.C., Jun. 17

Menasha, Wis., Jun. 11

2014: 17 killed, 28 wounded

Marysville, Wash., Oct. 24

Santa Barbara, Calif., May. 23

Fort Hood, Texas, Apr. 3

Alturas, Calif., Feb. 20

2013: 31 killed, 13 wounded

Washington, D.C., Sep. 16

Hialeah, Fla., Jul. 26

Santa Monica, Calif., Jun. 7

Federal Way, Wash., Apr. 21

Herkimer County, N.Y., Mar. 13

2012: 67 killed, 68 wounded

Newtown, Conn., Dec. 14

Minneapolis, Minn., Sep. 27

Oak Creek, Wis., Aug. 5

Aurora, Colo., Jul. 20

Seattle, Wash., May. 20

Oakland, Calif., Apr. 2

Norcross, Ga., Feb. 22

2011: 18 killed, 21 wounded

Seal Beach, Calif., Oct. 14

Carson City, Nev., Sep. 6

Tucson, Ariz., Jan. 8

2010: 8 killed, 2 wounded

Manchester, Conn., Aug. 3

2009: 38 killed, 37 wounded

Parkland, Wash., Nov. 29

Fort Hood, Texas, Nov. 5

Binghamton, N.Y., Apr. 3

Carthage, N.C., Mar. 29

2008: 16 killed, 24 wounded

Henderson, Ky., Jun. 25

DeKalb, Ill., Feb. 14

Kirkwood, Mo., Feb. 7

2007: 51 killed, 32 wounded

Omaha, Neb., Dec. 5

Crandon, Wis., Oct. 7

Blacksburg, Va., Apr. 16

Salt Lake City, Utah, Feb. 12

2006: 18 killed, 7 wounded

Lancaster County, Pa., Oct. 2

Seattle, Wash., Mar. 25

Goleta, Calif., Jan. 30

2005: 16 killed, 9 wounded

Red Lake, Minn., Mar. 21

Brookfield, Wis., Mar. 12

2004: 4 killed, 7 wounded

Columbus, Ohio, Dec. 8

2003: 6 killed, 8 wounded

Meridian, Miss., Jul. 8

2001: 4 killed, 4 wounded

Melrose Park, Ill., Feb. 5

2000: 7 killed, 0 wounded

Wakefield, Mass., Dec. 26

1999: 44 killed, 54 wounded

Tampa, Fla., Dec. 30

Honolulu, Hawaii, Nov. 2

Fort Worth, Texas, Sep. 15

Atlanta, Ga., Jul. 29

Littleton, Colo., Apr. 20

1998: 13 killed, 36 wounded

Springfield, Ore., May. 21

Jonesboro, Ark., Mar. 24

Newington, Conn., Mar. 6

1997: 8 killed, 5 wounded

Orange, Calif., Dec. 18

Aiken, S.C., Sep. 15

1996: 5 killed, 1 wounded

Fort Lauderdale, Fla., Feb. 9

1995: 5 killed, 0 wounded

Corpus Christi, Texas, Apr. 3

1994: 4 killed, 23 wounded

Fairchild Air Force Base, Wash., Jun. 20

1993: 22 killed, 34 wounded

Aurora, Colo., Dec. 14

Garden City, N.Y., Dec. 7

Fayetteville, N.C., Aug. 6

San Francisco, Calif., Jul. 1

1992: 8 killed, 10 wounded

Watkins Glen, N.Y., Oct. 15

Olivehurst, Calif., May. 1

1991: 32 killed, 26 wounded

Royal Oak, Miss., Nov. 14

Iowa City, Iowa, Nov. 1

Killeen, Texas, Oct. 16

1990: 8 killed, 6 wounded

Jacksonville, Fla., Jun. 18

1989: 13 killed, 41 wounded

Louisville, Ky., Sep. 14

Stockton, Calif., Jan. 17

1988: 7 killed, 4 wounded

Sunnyvale, Calif., Feb. 16

1987: 6 killed, 14 wounded

Palm Bay, Fla., Apr. 23

1986: 14 killed, 6 wounded

Edmond, Okla., Aug. 20

1984: 27 killed, 20 wounded

San Ysidro, Calif., Jul. 18

Dallas, Texas, Jun. 29

1982: 8 killed, 3 wounded

Miami, Fla., Aug. 20

America’s mass shooting epidemic defies not only one’s sense of humanity, but also the basic practice of counting.

There are several common means of tallying mass shootings with widely divergent results, based on, for example, whether one limits to incidents of indiscriminate

killings versus targeted homicides.

As Mother Jones‘ Mark Follman notes, the actual number of fatalities is probably higher.

A 2013 federal mandate authorized by President Obama lowered the definition of a mass shooting down from four victims to three,

which led to more of these shootings being tracked, but there may be earlier ones that are not included.

The chart also does not include the thousands of killings each year in which there were fewer than three fatalities.

Due to an editing error, the previous version of this story misstated in one instance the number of people who were wounded by gunfire in the Oct. 2017 Las Vegas shooting. It was 422, not 546.

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