Frequencies for first 10,000 rows of pct012n074 variable in sf12010860us33 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,774       97.74       97.74
          1 |        187        1.87       99.61
          2 |         24        0.24       99.85
          3 |          3        0.03       99.88
          4 |          4        0.04       99.92
          5 |          3        0.03       99.95
          6 |          1        0.01       99.96
          7 |          1        0.01       99.97
          8 |          1        0.01       99.98
          9 |          1        0.01       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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