From the Officer Down Memorial Page
https://www.odmp.org/search/year?year=2013
114 killed in 2013
https://www.odmp.org/search/year?year=2013
127 killed in 2014
Again, Not sure where you're getting your numbers from, but they are wrong.
Follow the link I provided in the original post. The study was conducted on police officers murdered. My point was that while being murdered was rare, a police officer winds up enduring a lot of "minor" assaults. Let's face it. A LEO, quite often, interacts with people who are having a bad day.