Frequencies for first 10,000 rows of pct012k176 variable in sf12010860us30 dataset :

   69 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,385       93.85       93.85
          1 |        507        5.07       98.92
          2 |         71        0.71       99.63
          3 |         11        0.11       99.74
          4 |          4        0.04       99.78
          5 |          4        0.04       99.82
          6 |          4        0.04       99.86
          7 |          2        0.02       99.88
          8 |          2        0.02       99.90
          9 |          1        0.01       99.91
         10 |          1        0.01       99.92
         11 |          1        0.01       99.93
         12 |          1        0.01       99.94
         16 |          1        0.01       99.95
         20 |          1        0.01       99.96
         22 |          2        0.02       99.98
         27 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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