Frequencies for first 10,000 rows of pct012f084 variable in sf12000860us21 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,529       95.29       95.29
          1 |        285        2.85       98.14
          2 |         72        0.72       98.86
          3 |         35        0.35       99.21
          4 |         18        0.18       99.39
          5 |         22        0.22       99.61
          6 |         11        0.11       99.72
          7 |         12        0.12       99.84
          8 |          5        0.05       99.89
          9 |          4        0.04       99.93
         10 |          4        0.04       99.97
         11 |          1        0.01       99.98
         12 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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