This number is a bit inaccurate. We currently have 41 open retirement bugs which means that the potential number of active contributors is 227. Plus, we do have some people listed in that list that have no commit access so, again, the number of potential active contributors with commit access is ~220. Then again, not all of them are active. I am quite confident that there are no more than 190 active developers right now in Gentoo. This is not as bad as it may sound, since this number remains constant for the last 3-4 years.