Frequencies for first 10,000 rows of pct012e151 variable in sf12010860us24 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,721       97.21       97.21
          1 |        255        2.55       99.76
          2 |         21        0.21       99.97
          3 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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