If you are one of those geeky types who likes tables, charts and numbers, then the website Bachtrack is for you. They recently ran a query to find the "composers with most opera performances" and "most performed operas" for 2010 and the results may (or may not) surprise you. Check it out after the jump.
Composers with most opera performances (worldwide):
1) Verdi 824
2) Mozart 771
3) Puccini 681
4) Wagner 273
5) Rossini 259
6) R.Strauss 246
7) Donizetti 240
8) Bizet 226
9) Britten 129
10) Tchaikovsky 111
Most performed operas (worldwide):
1) La Bohème (Puccini) 243
2) Le Nozze di Figaro (Mozart) 238
3) Carmen (Bizet) 212
4) Tosca (Puccini) 211
5) La Traviata (Verdi) 200
6) Don Giovanni (Mozart) 156
7) Die Zauberflöte (Mozart) 137
8) Il Barbiere di Siviglia (Rossini) 124
9) Madama Butterfly (Puccini) 112
10) Rigoletto (Verdi) 102
[Source]