Frequencies for first 10,000 rows of ot_srvc_cd variable in pos2002 dataset : srv: | occupationa | l therapy | Freq. Percent Cum. ------------+----------------------------------- | 6,746 67.46 67.46 0 | 680 6.80 74.26 1 | 985 9.85 84.11 2 | 1,249 12.49 96.60 3 | 340 3.40 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017