Last year I didn't have anything published, which makes it the first year in getting on for 20 that I haven't been able to add something to my bibliography by the year's end. However, I do currently have 2 journal articles, 4 book chapters, and a couple of fairly substantial encyclopedia entries somewhere along in the publication process, and indeed, one of the books in which I have a chapter should finally make its appearance, having been nearly 6 years in the pipeline, early this year.
I also recall that there is another chapter, in the proposed proceedings of an archives conference which took place in the spring of 2007, about which I have heard nothing for a very long time, and assume that the project has quietly expired. Not that one can always count on this; it is not beyond the reach of probability that there will be a sudden and urgent call for final editorial revisions due the day before yesterday, after which there will be another lengthy hiatus.
The year, however, when everybody started saying to me 'Wow, you are so prolific' was probably 2001, in the course of which I saw finally reach the light of day one chapter in a volume generated by a conference in the summer of 1994 (and fortunately there had not been massive advances in the historiography of the topic since then) along with other things which had been turned around in considerably less time. The apparent prolificness was entirely an artefact of the publishing processes involved and not because I had spent the previous 12 months madly writing.
What you see can be quite misleading.