This has been true for decades. I don't see how that's totally relevant. Mass shootings such as these appear to be increasing. Unless your argument is "Across the country, less people are being shot overall". In which case... there are still far too many of these instances happening for us to just shurg off.
What difference is there between "regular" shootings and mass shootings if the number of homicides is decreasing every year? I know it's hard to remove emotion from it, but people (and politicians) need to look at the statistics objectively if anything is to be done.
This would be great, if the NRA and republicans weren't actively trying to prevent studies on guns to be conducted. ---