Frequencies for first 10,000 rows of pct012m154 variable in sf12010860us32 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,789       97.89       97.89
          1 |        195        1.95       99.84
          2 |         13        0.13       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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