Frequencies for first 10,000 rows of p_cf3 variable in person dataset : Person | Related | Factor 3 | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,941 99.41 99.41 2 | 2 0.02 99.43 4 | 9 0.09 99.52 5 | 1 0.01 99.53 38 | 1 0.01 99.54 50 | 1 0.01 99.55 99 | 45 0.45 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Apr 2016