CREATE TABLE table_name_34 (attendance VARCHAR(255), season VARCHAR(255), games VARCHAR(255), sellouts VARCHAR(255))
How many attendance numbers had more than 15 games, and sellouts of more than 8 in the 2011-12 season?
    
SQL: SELECT COUNT(attendance) FROM table_name_34 WHERE games > 15 AND sellouts > 8 AND season = "2011-12"