Frequencies for first 10,000 rows of pct012d201 variable in sf12010880us23 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,743       97.43       97.43
          1 |        191        1.91       99.34
          2 |         35        0.35       99.69
          3 |         16        0.16       99.85
          4 |          2        0.02       99.87
          5 |          6        0.06       99.93
          6 |          3        0.03       99.96
          7 |          1        0.01       99.97
         14 |          1        0.01       99.98
         20 |          1        0.01       99.99
         21 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017