Frequencies for first 10,000 rows of ca_disor variable in natl2016 dataset : Suspected | Chromosomal | Disorder C | Confirmed | Freq. Percent Cum. ------------+----------------------------------- C | 3 0.03 0.03 N | 9,984 99.84 99.87 P | 13 0.13 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 4 Oct 2017