Frequencies for first 10,000 rows of pct012c157 variable in sf12000860us18 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,681       86.81       86.81
          1 |        936        9.36       96.17
          2 |        235        2.35       98.52
          3 |         72        0.72       99.24
          4 |         33        0.33       99.57
          5 |         16        0.16       99.73
          6 |          6        0.06       99.79
          7 |          4        0.04       99.83
          9 |          2        0.02       99.85
         10 |          3        0.03       99.88
         11 |          1        0.01       99.89
         13 |          2        0.02       99.91
         19 |          1        0.01       99.92
         23 |          1        0.01       99.93
         27 |          1        0.01       99.94
         32 |          1        0.01       99.95
         35 |          1        0.01       99.96
         40 |          1        0.01       99.97
         45 |          1        0.01       99.98
         65 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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