Frequencies for first 10,000 rows of pct012c140 variable in sf12010860us22 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,496       84.96       84.96
          1 |        920        9.20       94.16
          2 |        310        3.10       97.26
          3 |        134        1.34       98.60
          4 |         42        0.42       99.02
          5 |         31        0.31       99.33
          6 |         27        0.27       99.60
          7 |         10        0.10       99.70
          8 |          7        0.07       99.77
          9 |          3        0.03       99.80
         11 |          1        0.01       99.81
         12 |          1        0.01       99.82
         13 |          2        0.02       99.84
         14 |          2        0.02       99.86
         16 |          1        0.01       99.87
         17 |          1        0.01       99.88
         19 |          1        0.01       99.89
         20 |          1        0.01       99.90
         21 |          1        0.01       99.91
         23 |          1        0.01       99.92
         26 |          1        0.01       99.93
         35 |          1        0.01       99.94
         40 |          1        0.01       99.95
         43 |          1        0.01       99.96
         52 |          1        0.01       99.97
         60 |          1        0.01       99.98
         61 |          1        0.01       99.99
         77 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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