Frequencies for first 10,000 rows of PCT012A104 variable in sf12000860us16 dataset : 105 to 109 | years | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,853 98.53 98.53 1 | 132 1.32 99.85 2 | 13 0.13 99.98 3 | 1 0.01 99.99 4 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 Apr 2017