A stepped line chart showing total mass killings using firearms, by day of the year. Each line represents one year, with killings on the y axis and day of the year on the x axis. By the 128th day of the year (May 6-7) in 2006-2022, there were between 4 and 14 mass killings. In contrast, there have been 22 mass killings as of May 7, 2023.