Frequencies for first 10,000 rows of pct012e167 variable in sf12010860us24 dataset :

   60 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,819       98.19       98.19
          1 |        170        1.70       99.89
          2 |         10        0.10       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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