The percentage of women working in key behind-the-scenes jobs on the 250 top-grossing domestic films “has barely budged” during the past two decades – increasing by only 4 percentage points from 17% in 1998 to 21% last year. That’s according to the latest “Celluloid Ceiling” report from Dr. Martha Lauzen, founder and executive director of the Center for the Study of Women in Television and Film at San Diego State University.