|1||it (#1)||Verdi (#1)||La traviata (629)|
|2||it (#2)||Puccini (#1)||La bohème (580)|
|3||fr (#1)||Bizet (#1)||Carmen (573)|
|4||at (#1)||Mozart (#1)||Die Zauberflöte (571)|
|5||it (#3)||Puccini (#2)||Tosca (504)|
|6||at (#2)||Mozart (#2)||Le nozze di Figaro (494)|
|7||it (#4)||Puccini (#3)||Madama Butterfly (469)|
|8||it (#5)||Rossini (#1)||Il barbiere di Siviglia (465)|
|9||it (#6)||Verdi (#2)||Rigoletto (434)|
|10||at (#3)||Mozart (#3)||Don Giovanni (433)|
This is a pretty useful set of objective statistics to use in my favorite hobby of answering questions that weren't asked by the people putting the list together. For example, we can look at peak age for composing an opera, in much the same way that Bill James surprised baseball fans by pointing out that age 27 had been the peak age for ballplayers. Opera composing is a long, grueling exercise often taking years to do, so it's pretty interesting to see what would be the best age for this.
I define human biodiversity to involve not just diversity between people but within a person as well; most notably, age.
Other facts from OperaBase:
The most performed female opera composer is Kaija Saariaho, with 18 performances over the last half decade.
The top living opera composer is Philip Glass with 69 performances.
The top opera cities in terms of numbers of performances are Berlin, Vienna, and London. Americans don't go to much opera. The top U.S. city is New York at #7 in the world, but then there's a long gap to San Francisco, Chicago, Houston, Los Angeles, Washington, and St. Louis.