Frequencies for first 10,000 rows of pct012e045 variable in sf12010860us24 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,723       97.23       97.23
          1 |        243        2.43       99.66
          2 |         31        0.31       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