Frequencies for first 10,000 rows of pct012n178 variable in sf12010860us33 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,768       97.68       97.68
          1 |        176        1.76       99.44
          2 |         30        0.30       99.74
          3 |         13        0.13       99.87
          4 |          4        0.04       99.91
          5 |          1        0.01       99.92
          6 |          3        0.03       99.95
          7 |          1        0.01       99.96
         11 |          2        0.02       99.98
         14 |          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