Frequencies for first 10,000 rows of othimage variable in nhamcsopd2002 dataset : other | imaging | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,283 92.83 92.83 1 | 717 7.17 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016