Frequencies for first 10,000 rows of pct012e050 variable in sf12010860us24 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,721       97.21       97.21
          1 |        256        2.56       99.77
          2 |         21        0.21       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017