|Race at Churchill Downs Wikipedia|
If you check the charts, 790 horses died in 2009, 727 in 2010, 713 in 2011, 709 in 2012, 643 in 2013, 583 in 2014. The number of starts have declined steadily over the 8 year period also from 395897 in 2009 to 2999121 in 2015. My personal opinion is that 1.6 horses die from fatal injuries every 1000 starts is still too high. Can you imagine if we said 1.6 horses were going to die every 1000 dressage classes? Or every 1000 Icelandic horse classes? Or barrel racing starts?
Here is a link to the report
Jockey Club Table of Fatalities per Year