Frequencies for first 10,000 rows of pct012c041 variable in sf12010860us22 dataset :

   38 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,345       83.45       83.45
          1 |      1,027       10.27       93.72
          2 |        337        3.37       97.09
          3 |        134        1.34       98.43
          4 |         58        0.58       99.01
          5 |         43        0.43       99.44
          6 |         15        0.15       99.59
          7 |         16        0.16       99.75
          8 |          1        0.01       99.76
          9 |          3        0.03       99.79
         10 |          4        0.04       99.83
         11 |          1        0.01       99.84
         12 |          2        0.02       99.86
         13 |          1        0.01       99.87
         14 |          2        0.02       99.89
         17 |          1        0.01       99.90
         23 |          2        0.02       99.92
         25 |          1        0.01       99.93
         28 |          2        0.02       99.95
         29 |          1        0.01       99.96
         52 |          1        0.01       99.97
         54 |          1        0.01       99.98
         71 |          1        0.01       99.99
         86 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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