Frequencies for first 10,000 rows of pct012e150 variable in sf12000860us20 dataset :

   43 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,741       97.41       97.41
          1 |        233        2.33       99.74
          2 |         25        0.25       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017