Frequencies for first 10,000 rows of pct012e143 variable in sf12000860us20 dataset :

   36 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,701       97.01       97.01
          1 |        264        2.64       99.65
          2 |         27        0.27       99.92
          3 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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