Frequencies for first 10,000 rows of pct012o034 variable in sf12010860us34 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,013       70.13       70.13
          1 |      1,357       13.57       83.70
          2 |        536        5.36       89.06
          3 |        333        3.33       92.39
          4 |        213        2.13       94.52
          5 |        176        1.76       96.28
          6 |         99        0.99       97.27
          7 |         71        0.71       97.98
          8 |         42        0.42       98.40
          9 |         43        0.43       98.83
         10 |         27        0.27       99.10
         11 |         30        0.30       99.40
         12 |         18        0.18       99.58
         13 |         11        0.11       99.69
         14 |          7        0.07       99.76
         15 |          4        0.04       99.80
         16 |          4        0.04       99.84
         17 |          2        0.02       99.86
         18 |          3        0.03       99.89
         20 |          6        0.06       99.95
         22 |          1        0.01       99.96
         23 |          1        0.01       99.97
         28 |          1        0.01       99.98
         30 |          1        0.01       99.99
         47 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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