Code:
Cohort | Freq. Percent Cum.
------------+-----------------------------------
-2 | 5,245 15.43 15.43
-4 | 6,325 18.61 34.04
-6 | 6,478 19.06 53.10
0 | 4,371 12.86 65.96
6 | 4,244 12.49 78.45
8 | 7,325 21.55 100.00
------------+-----------------------------------
Total | 33,988 100.00
