Frequencies for first 10,000 rows of pct012e142 variable in sf12010860us24 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,688       96.88       96.88
          1 |        268        2.68       99.56
          2 |         36        0.36       99.92
          3 |          6        0.06       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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