Frequencies for first 10,000 rows of pct012k174 variable in sf12000860us26 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,485       94.85       94.85
          1 |        435        4.35       99.20
          2 |         52        0.52       99.72
          3 |         11        0.11       99.83
          4 |          7        0.07       99.90
          5 |          1        0.01       99.91
          8 |          1        0.01       99.92
          9 |          1        0.01       99.93
         11 |          1        0.01       99.94
         12 |          2        0.02       99.96
         14 |          2        0.02       99.98
         19 |          1        0.01       99.99
         45 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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