Frequencies for first 10,000 rows of othproc variable in nhamcsopd2007 dataset : other | procedure | Freq. Percent Cum. ------------+----------------------------------- no | 8,535 85.35 85.35 yes | 1,465 14.65 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016