[I have a post sitting at home on the computer that didn't run this morning, but here's something to tide you over].
This week, CaBi reproted that they have only had 17 reported crashes since the system started and there have been over 1.5 million trips. This creates a ratio of 88325 trips per crash.
If we assume that ratio holds for all cyclists, and I freely admit that there are many reasons why we should not, we can then multiply it times the average number of reproted bike crashes (265 on average according to MPD) per year and find that there are 23,382,352 total bike trips per year in Washington, DC.
That's not bad.