Frequencies for first 10,000 rows of pct012k079 variable in sf12010880us30 dataset :

   76 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,769       97.69       97.69
          1 |        208        2.08       99.77
          2 |         20        0.20       99.97
          3 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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