Frequencies for first 10,000 rows of orthoped variable in nhamcsed1992 dataset : Orthopedic | care | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,289 92.89 92.89 1 | 711 7.11 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016