Frequencies for first 10,000 rows of pct012n057 variable in sf12010860us33 dataset :

   54 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,386       93.86       93.86
          1 |        443        4.43       98.29
          2 |         96        0.96       99.25
          3 |         29        0.29       99.54
          4 |         11        0.11       99.65
          5 |          7        0.07       99.72
          6 |          4        0.04       99.76
          7 |          6        0.06       99.82
          8 |          3        0.03       99.85
          9 |          4        0.04       99.89
         10 |          2        0.02       99.91
         11 |          1        0.01       99.92
         12 |          1        0.01       99.93
         13 |          2        0.02       99.95
         20 |          1        0.01       99.96
         21 |          1        0.01       99.97
         22 |          1        0.01       99.98
         24 |          1        0.01       99.99
         29 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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