Frequencies for first 10,000 rows of pct012c056 variable in sf12010860us22 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,384       83.84       83.84
          1 |      1,119       11.19       95.03
          2 |        293        2.93       97.96
          3 |         97        0.97       98.93
          4 |         39        0.39       99.32
          5 |         24        0.24       99.56
          6 |         15        0.15       99.71
          7 |          8        0.08       99.79
          8 |          4        0.04       99.83
          9 |          2        0.02       99.85
         10 |          3        0.03       99.88
         11 |          1        0.01       99.89
         15 |          1        0.01       99.90
         18 |          1        0.01       99.91
         25 |          1        0.01       99.92
         27 |          1        0.01       99.93
         31 |          1        0.01       99.94
         32 |          1        0.01       99.95
         34 |          1        0.01       99.96
         50 |          1        0.01       99.97
         59 |          1        0.01       99.98
         60 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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