Deadly count: US averages 20 mass shootings every year.

According to an ongoing tally kept by the Brady Campaign to Prevent Gun Violence, the United States is experiencing an average of around 20 mass shootings each year. While Friday morning’s incident inside of a Aurora movie theater has perhaps the unfortunate distinction of being the most violent in recent memory — taking no fewer than 12 lives and injuring around 50 more — it is only yet only one example out of many that has marred society this year.

The Aurora massacre is believed to be one of the worst incident on American soil since a rampage at Virginia Tech in 2007 left 32 people dead. The Fort Hood, Texas massacre two years later also ended with massive bloodshed, as well, with 13 people losing their lives in that event.

Since 2005, however, the Brady Campaign says that these events are occurring, at least on some scale, in remarkable numbers.

According to the campaign, who brands itself with the slogan “sensible gun laws save lives,” the Aurora incident is already the sixth mass shooting in the month of July alone.