Frequencies for first 10,000 rows of pct012c037 variable in sf12010860us22 dataset :

   34 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,469       84.69       84.69
          1 |        920        9.20       93.89
          2 |        317        3.17       97.06
          3 |        135        1.35       98.41
          4 |         58        0.58       98.99
          5 |         33        0.33       99.32
          6 |         18        0.18       99.50
          7 |          7        0.07       99.57
          8 |         14        0.14       99.71
          9 |          4        0.04       99.75
         10 |          8        0.08       99.83
         11 |          4        0.04       99.87
         12 |          2        0.02       99.89
         20 |          1        0.01       99.90
         21 |          1        0.01       99.91
         22 |          1        0.01       99.92
         25 |          1        0.01       99.93
         32 |          2        0.02       99.95
         36 |          1        0.01       99.96
         46 |          1        0.01       99.97
         49 |          1        0.01       99.98
         61 |          1        0.01       99.99
         64 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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