Frequencies for first 10,000 rows of pct012m148 variable in sf12010860us32 dataset :

   41 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,771       97.71       97.71
          1 |        206        2.06       99.77
          2 |         20        0.20       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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