Frequencies for first 10,000 rows of prov3370 variable in pos1999 dataset : srv: phys | ther-onsite | -non | resident | Freq. Percent Cum. ------------+----------------------------------- | 7,387 73.87 73.87 N | 2,465 24.65 98.52 Y | 148 1.48 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016