Frequencies for first 10,000 rows of paypriv variable in namcs2012 dataset : Expected | source of | payment for | visit: | Private | insurance | Freq. Percent Cum. ------------+----------------------------------- No | 4,063 40.63 40.63 Yes | 5,937 59.37 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016