Cite your source for "4 million Americans injured per year".

The latest accurate figure I find is 2.5 million in 2012 in the 2014 CDC Report.  And of those "injured", 2.3 million were NOT hospitalized.

https://www.cdc.gov/vitalsigns/crash-injuries/index.html

Once again, you are inventing statistics to support your diatribes.  Assume that I will personally research every statistic you post.