Frequencies for first 10,000 rows of pct012m167 variable in sf12010880us32 dataset :

   60 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,883       98.83       98.83
          1 |        113        1.13       99.96
          2 |          3        0.03       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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