Frequencies for first 10,000 rows of splint variable in nhamcsopd2009 dataset : splint | Freq. Percent Cum. ------------+----------------------------------- no | 9,948 99.48 99.48 yes | 52 0.52 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016