Frequencies for first 10,000 rows of pct012e031 variable in sf12010860us24 dataset :

   28 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,603       96.03       96.03
          1 |        331        3.31       99.34
          2 |         45        0.45       99.79
          3 |         13        0.13       99.92
          4 |          7        0.07       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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