Frequencies for first 10,000 rows of pct012e048 variable in sf12000860us20 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,778       97.78       97.78
          1 |        206        2.06       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 , 18 Apr 2017