Frequencies for first 10,000 rows of pct012e042 variable in sf12010860us24 dataset :

   39 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,712       97.12       97.12
          1 |        264        2.64       99.76
          2 |         18        0.18       99.94
          3 |          4        0.04       99.98
          4 |          1        0.01       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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