Frequencies for first 10,000 rows of pct012e041 variable in sf12000860us20 dataset :

   38 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,737       97.37       97.37
          1 |        234        2.34       99.71
          2 |         27        0.27       99.98
          3 |          1        0.01       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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