Frequencies for first 10,000 rows of pct012c177 variable in sf12010860us22 dataset :

   70 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,287       92.87       92.87
          1 |        533        5.33       98.20
          2 |        111        1.11       99.31
          3 |         32        0.32       99.63
          4 |         16        0.16       99.79
          5 |          5        0.05       99.84
          6 |          4        0.04       99.88
          7 |          1        0.01       99.89
          8 |          1        0.01       99.90
         11 |          1        0.01       99.91
         12 |          3        0.03       99.94
         13 |          1        0.01       99.95
         17 |          1        0.01       99.96
         23 |          1        0.01       99.97
         32 |          1        0.01       99.98
         33 |          1        0.01       99.99
         41 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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