What are the top 20 most performed operas?

Question:

What are the top 20 most performed operas?

up to 2005.

Best Answer - Chosen by Asker: Here is one list:

1.Madame Butterfly
2.La Boh㨭e
3.La Traviata
4.Carmen
5.Barber of Seville
6.Marriage of Figaro
7.Don Giovanni
8.Tosca
9.Rigoletto
10.Magic Flute
11.La Cenerentola
12.Turandot
13.Lucia di Lammermoor
14. Pagliacci
15.Cosi Fan Tutte
16.Aida
17.Il Trovatore
18. Faust
19.Die Fledermaus
20.Elixir of Love

I will add that American operas you should consider are:

1. Susannah
2. Porgy and Bess
3. Vanessa
4. Ghosts of Versailles
5. The Medium
6. The Consul
7. Ballad of Baby Doe
8. Antony and Cleopatra
9. Of Mice and Men
10. Cold Sassy Tree