It's hard to get to the data but have a look at the latest vessel casualties in the right hand column:
http://www.lloydslistintelligence.com/
Also, the project site leeds to http://coast.gkss.de/projects/maxwave/workp/wp4/wp4.html where you can find a map of ship casualties for a 4 year period http://coast.gkss.de/projects/maxwave/workp/wp4/casualties.j...
I am surprised myself, but 2 a week actually seems low!