If your not the blame(?) who is?
Don't forget its on 3 year basis, and a drop could equally be older slow results dropping off the calculation. In this case I suspect its mainly due to fewer 97 rules boats influencing the sums.
Cherub returns were dangerously low last year, and you guys badly need to get out and do more races. Also, make sure your clubs are putting returns in, and if not, maybe you could volunteer to help them out:-)