Broadway box office held rock-steady in Week 8 (July 16-22), with declines at some shows balanced by rises at others, in what was a healthy summertime frame overall.Among the most notable rises was “A Streetcar Named Desire” ($614,897), which capped off its run of generally middling sales with a hefty spike, shooting up 26% (or $125,000) in its final week on the boards. Spring’s hot-ticket musicals, “Once” ($1,069,942) and “Newsies” ($1,066,049), gained some steam, with the latter breaking the house record at the Nederlander for the fifth time. Those increases balanced out the slowdowns at other productions. Biggest drop of the sesh was at “Evita” ($1,039,330), slipping due to the three sick days taken by topliner Ricky Martin, but still robust enough to land in the millionaires’ club. “Nice Work If You Can Get It” ($767,559), “Ghost” ($528,401) and “Clybourne Park” ($358,048) also slackened. Overall sales upticked slightly to $23.8 million for the 28 shows on the boards. Attendance remained essentially flat at nearly 240,000. One of the newest additions to the Main Stem slate, “Bring It On” ($374,495), played its first frame of seven previews vs. the four it played the prior week. Production execs have said daily ticket sales are on the rise. The 19 musicals grossed $19,402,618 for 81.5% of the Broadway total, with attendance of 184,951 and an average paid admission of $104.91. The nine plays grossed $4,410,152 for 18.5% of the Broadway total, with attendance of 54,322 and an average paid admission of $81.19.