hmmm, there are almost always about 3 russian trawlers on the raid which I can see, that makes the average a day, say 3. Then add the boats and ships I see down at the marina/harbor/shipyard, that would be about well, at least 200. now let's split those 200 boats up in 7 days, which makes it about 28+ the 3 trawlers a day. So the average would be 31 vessels a day, which again would be in average 11315 vessels a year, though many are the same vessels.
I wonder what numbers those who who work at sea will have, I don't dare to think about it.