NEW YORK — Broadway grosses gained some momentum during Week 51 (May 13-19), rising by 7.4% to $14,943,583. Attendance of 247,413 was up by a similar 8% figure.

There were B.O. increases at all but two shows, with “Mamma Mia!” and “Oklahoma!” the only shows to buck the trend, registering insignificant drops.

Newcomer “Thoroughly Modern Millie” continued to gain steam, rising by $79,764 to $691,426, on the heels of last week’s jump of more than $100,000.

Biggest jump came at “The Full Monty,” up by $102,237 to $421,869. In her penultimate week on the Broadway boards, “Elaine Stritch at Liberty” jumped by $75,359 to $368,232.

The 19 musicals grossed $11,130,919 for 74.5% of the Broadway total, with attendance of 171,058 repping 82.2% of capacity.

The 14 plays grossed $3,812,664 for 25.5% of the Broadway total, with attendance of 76,355 repping 73.5% of capacity.

Average ticket prices were $65.07 for musicals, $49.93 for plays and $60.40 for all shows.