Frequencies for first 10,000 rows of pct012n181 variable in sf12010880us33 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,798       97.98       97.98
          1 |        156        1.56       99.54
          2 |         25        0.25       99.79
          3 |         10        0.10       99.89
          4 |          4        0.04       99.93
          7 |          1        0.01       99.94
          8 |          1        0.01       99.95
          9 |          1        0.01       99.96
         10 |          2        0.02       99.98
         11 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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