Frequencies for first 10,000 rows of prov1820 variable in pos1997 dataset : resident | program | approved by | other | Freq. Percent Cum. ------------+----------------------------------- | 8,792 87.92 87.92 N | 1,101 11.01 98.93 Y | 107 1.07 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016