Its fallen to almost 400,000 in the last couple of years. For charter work usually see the 737, A320 and 757 types. Some flights have operated with 767's regularly. Plus the KLM fokkers 100/70's.
You must also remember that these are seasonal only, there is maybe 4 regular charters a week in the winter and as of next summer not many more than that. Coventry had a year round based operation hence more pax, same with BLK.