Frequencies for first 10,000 rows of pct012e141 variable in sf12000860us20 dataset :

   34 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,707       97.07       97.07
          1 |        267        2.67       99.74
          2 |         20        0.20       99.94
          3 |          3        0.03       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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