Frequencies for first 10,000 rows of pct012n125 variable in sf12010860us33 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,743       87.43       87.43
          1 |        797        7.97       95.40
          2 |        238        2.38       97.78
          3 |         96        0.96       98.74
          4 |         49        0.49       99.23
          5 |         24        0.24       99.47
          6 |         10        0.10       99.57
          7 |         11        0.11       99.68
          8 |          3        0.03       99.71
          9 |          1        0.01       99.72
         10 |          5        0.05       99.77
         11 |          3        0.03       99.80
         12 |          5        0.05       99.85
         13 |          1        0.01       99.86
         14 |          1        0.01       99.87
         15 |          2        0.02       99.89
         16 |          2        0.02       99.91
         17 |          2        0.02       99.93
         18 |          1        0.01       99.94
         19 |          1        0.01       99.95
         23 |          1        0.01       99.96
         37 |          1        0.01       99.97
         39 |          1        0.01       99.98
         43 |          1        0.01       99.99
         71 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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