I tried to look it up. The Post has police shootings at around 400 people. Half were white and half were minority. 2/3 of the minority were black. So, I think around 133.
http://www.washingtonpost.com/national/fatal-police-shooting...
http://www.washingtonpost.com/national/fatal-police-shooting...
"Overall, blacks were killed at three times the rate of whites or other minorities when adjusting by the population of the census tracts where the shootings occurred."
http://www.politifact.com/punditfact/statements/2015/apr/02/...