Frequencies for first 10,000 rows of pct012k053 variable in sf12000860us26 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,865       88.65       88.65
          1 |        875        8.75       97.40
          2 |        172        1.72       99.12
          3 |         48        0.48       99.60
          4 |         11        0.11       99.71
          5 |          8        0.08       99.79
          6 |          3        0.03       99.82
          7 |          3        0.03       99.85
          9 |          4        0.04       99.89
         10 |          1        0.01       99.90
         11 |          1        0.01       99.91
         15 |          1        0.01       99.92
         21 |          1        0.01       99.93
         24 |          1        0.01       99.94
         30 |          2        0.02       99.96
         34 |          1        0.01       99.97
         47 |          1        0.01       99.98
         48 |          1        0.01       99.99
         49 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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