He mines the data, which goes back to 1994, and comes up with a list of eleven plays that are the most produced from 2001-Present. He makes some some interesting observations.
Then he goes back and comes up with an even larger list of "the 76 most frequently produced plays of the past decade." What did he find?
For me, though, the really big surprise was the dog that didn't bark. Only one of the top 11 plays, "The Glass Menagerie," is a classic, and it was written in 1944. The others were all written between 1994 and 2006. And in addition to "The Glass Menagerie," only five classics by playwrights other than Shakespeare—"The Importance of Being Earnest," "Our Town," "Private Lives," "A Streetcar Named Desire" and "Tartuffe"—made it onto the longer list.
As for the celebrated playwrights of the past who didn't make the cut, the list is alarmingly long. No Samuel Beckett, no Bertolt Brecht, no Anton Chekhov, no Georges Feydeau, no Henrik Ibsen, no William Inge, no Eugène Ionesco, no Arthur Miller, no Clifford Odets, no Eugene O'Neill, no George Bernard Shaw, no Aristophanes or Euripides or Sophocles, no Rodgers and Hammerstein or Frank Loesser or Lerner and Loewe . . . no history, in other words.