Frequencies for first 10,000 rows of pct012e152 variable in sf12010860us24 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,703       97.03       97.03
          1 |        265        2.65       99.68
          2 |         28        0.28       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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