Assertion: police's number | /r/CapableOf | trend down since 1970
Facets:
value: of the 135
type: OTHER
Source sentences:
text: The number of police officers dying in the line of duty has been trending down since the 1970s, but of the 135 who died in 2016, 21 died in a spike of ambush-style attacks, according to National Law Enforcement Officers Memorial Fund data.