Frequencies for first 10,000 rows of pct012e030 variable in sf12010860us24 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,588       95.88       95.88
          1 |        324        3.24       99.12
          2 |         64        0.64       99.76
          3 |         16        0.16       99.92
          4 |          5        0.05       99.97
          5 |          2        0.02       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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