“Three of New York’s most popular musicals boosted their top everyday ticket price 10% this month — exceeding the $100 ceiling that had held steady for more than four years. The increase was the first since “The Producers” spurred a wave of $100 tickets in April 2001. The latest move comes at a time of rising production costs for ever-more-elaborate shows. It helps that attendance is finally back to pre-Sept. 11, 2001, levels. Twenty weeks into the season, overall box-office receipts are up 11% from last year, and attendance has increased 6.6% in the same period.”