Frequencies for first 10,000 rows of pct012k046 variable in sf12010860us30 dataset :

   43 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,740       87.40       87.40
          1 |        937        9.37       96.77
          2 |        223        2.23       99.00
          3 |         52        0.52       99.52
          4 |         18        0.18       99.70
          5 |          7        0.07       99.77
          6 |          3        0.03       99.80
          7 |          4        0.04       99.84
          8 |          1        0.01       99.85
          9 |          1        0.01       99.86
         11 |          2        0.02       99.88
         12 |          1        0.01       99.89
         17 |          3        0.03       99.92
         18 |          1        0.01       99.93
         28 |          2        0.02       99.95
         32 |          1        0.01       99.96
         39 |          1        0.01       99.97
         46 |          1        0.01       99.98
         55 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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