First of all there were zero 121 carrier deaths in 2016, or 2015. Basically the same for 135 operation. The last reported death for scheduled commercial flights was February 2009.
True for 121, but not for 135. There were roughly 30 fatalities last year in about a dozen 135 accidents -- including fatal crashes of at least two scheduled commercial flights (from the same company, no less).
Most of these were single-pilot ops, so roughly a dozen commercial pilots were lost. Two big groups in fatal 135 crashes were Alaska commuter ops and medical/medevac flights (both fixed wing and helicopter).
We also lost ~ 12 commercial pilots last year to fatal accidents in agricultural ops; I believe all were aerial spraying accidents.
Add Part 91 crashes (e.g., private biz jets w/ commercial crew, flight instructing accidents, etc.) then the 57 commercial pilot fatalities reported by BLS looks correct.