Frequencies for first 10,000 rows of pct012e048 variable in sf12010860us24 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,727       97.27       97.27
          1 |        241        2.41       99.68
          2 |         26        0.26       99.94
          3 |          5        0.05       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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