Frequencies for first 10,000 rows of pct012e135 variable in sf12010860us24 dataset :

   28 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,656       96.56       96.56
          1 |        292        2.92       99.48
          2 |         38        0.38       99.86
          3 |         12        0.12       99.98
          4 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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