I was unable to find the reporting of incidents of LEOs accosted by a nutbar anywhere in the Link Removed.
However, Link Removed did give a really good, concise breakdown of the 530 LEOs feloniously killed between 1999 and 2008:
122 - Arrest situation
106 - Ambush situation
101 - Traffic pursuit/stop (38 felony vehicle stop, 63 traffic violation stop)
76 - Disturbance call (41 domestic disturbance, 35 other disturbance)
62 - Investigating suspicious person/circumstance
29 - Tactical situation (barricaded offender, hostage taking, high-risk entry, etc.)
13 - Handling, transporting, custody of prisoner
12 - Handling person with mental illness
9 - Investigative activity (surveillance, search, interview, etc.)
LEOKA reporting does not distinguish between traffic stops and traffic pursuit/stops among the 63 traffic violation stops. I would assert there is a world of difference between the danger inherent in a pursuit stop versus a traffic violation stop sans pursuit. Also, domestic disturbance calls, contrary to mythology, aren't the most dangerous endeavor known to LE.