Frequencies for first 10,000 rows of pct012k180 variable in sf12000860us26 dataset : 73 years | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,646 96.46 96.46 1 | 287 2.87 99.33 2 | 41 0.41 99.74 3 | 9 0.09 99.83 4 | 5 0.05 99.88 5 | 1 0.01 99.89 6 | 2 0.02 99.91 7 | 1 0.01 99.92 8 | 1 0.01 99.93 9 | 1 0.01 99.94 11 | 1 0.01 99.95 12 | 1 0.01 99.96 17 | 1 0.01 99.97 21 | 1 0.01 99.98 23 | 1 0.01 99.99 28 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 Apr 2017