Frequencies for first 10,000 rows of pct012o071 variable in sf12010860us34 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,519       85.19       85.19
          1 |      1,068       10.68       95.87
          2 |        282        2.82       98.69
          3 |         80        0.80       99.49
          4 |         23        0.23       99.72
          5 |         15        0.15       99.87
          6 |          4        0.04       99.91
          7 |          3        0.03       99.94
          9 |          2        0.02       99.96
         12 |          1        0.01       99.97
         13 |          1        0.01       99.98
         15 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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