Frequencies for first 10,000 rows of pct012n071 variable in sf12010880us33 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,760       97.60       97.60
          1 |        193        1.93       99.53
          2 |         22        0.22       99.75
          3 |         15        0.15       99.90
          4 |          2        0.02       99.92
          5 |          3        0.03       99.95
          6 |          2        0.02       99.97
          7 |          1        0.01       99.98
          9 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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