It's quite obvious that the "currently active" number means just that, because the report lists 1,613 "Instructors currently certified".
In the section below, where it lists "cumulative totals", we see that 4,273 instructors have been certified since September 1, 1995.
I love the "licenses active by age" section! Eighty-eight CHLs age 90 or older, including one who's 100!
Having an adding machine and a few minutes to kill, I ran a tape on the "licenses active by age" number. Gee, it's the same as the total of "current active" licenses!
Kevin