Frequencies for first 10,000 rows of pct012k047 variable in sf12000860us26 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,762       87.62       87.62
          1 |        950        9.50       97.12
          2 |        180        1.80       98.92
          3 |         50        0.50       99.42
          4 |         23        0.23       99.65
          5 |         10        0.10       99.75
          6 |          4        0.04       99.79
          8 |          7        0.07       99.86
          9 |          1        0.01       99.87
         10 |          2        0.02       99.89
         14 |          1        0.01       99.90
         17 |          1        0.01       99.91
         18 |          1        0.01       99.92
         20 |          1        0.01       99.93
         23 |          1        0.01       99.94
         25 |          1        0.01       99.95
         26 |          1        0.01       99.96
         39 |          1        0.01       99.97
         42 |          1        0.01       99.98
         52 |          1        0.01       99.99
         65 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017