Frequencies for first 10,000 rows of pct012k157 variable in sf12000860us26 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,840       88.40       88.40
          1 |        865        8.65       97.05
          2 |        202        2.02       99.07
          3 |         44        0.44       99.51
          4 |         19        0.19       99.70
          5 |          8        0.08       99.78
          6 |          3        0.03       99.81
          7 |          4        0.04       99.85
          8 |          1        0.01       99.86
          9 |          1        0.01       99.87
         10 |          1        0.01       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
         38 |          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