Frequencies for first 10,000 rows of pct012k053 variable in sf12010860us30 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,651       86.51       86.51
          1 |        971        9.71       96.22
          2 |        252        2.52       98.74
          3 |         64        0.64       99.38
          4 |         31        0.31       99.69
          5 |          9        0.09       99.78
          6 |          3        0.03       99.81
          7 |          2        0.02       99.83
          8 |          2        0.02       99.85
          9 |          1        0.01       99.86
         10 |          2        0.02       99.88
         12 |          1        0.01       99.89
         14 |          1        0.01       99.90
         18 |          1        0.01       99.91
         21 |          1        0.01       99.92
         29 |          1        0.01       99.93
         32 |          1        0.01       99.94
         33 |          1        0.01       99.95
         35 |          1        0.01       99.96
         40 |          1        0.01       99.97
         64 |          1        0.01       99.98
         66 |          1        0.01       99.99
         74 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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