Frequencies for first 10,000 rows of pct012n080 variable in sf12010860us33 dataset :

   77 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,864       98.64       98.64
          1 |        114        1.14       99.78
          2 |         10        0.10       99.88
          3 |          5        0.05       99.93
          4 |          1        0.01       99.94
          5 |          2        0.02       99.96
          6 |          2        0.02       99.98
          9 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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