Here are some updated charts based yesterday's ACS data. First we can see that bike commuting in the area is generally growing, and at a rate faster than the national average.
And that when DC is compared to the 4 other big, high bike commute cities it is growing at around the same pace as most.
Encouraging, even as the number of bike commuters grows, bike fatalities for all cycling is dropping.
As a ratio of fatalities to bike commuting, the trend is generally down, though flat lately.