Frequencies for first 10,000 rows of pct012e136 variable in sf12010880us24 dataset :

   29 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,749       97.49       97.49
          1 |        216        2.16       99.65
          2 |         27        0.27       99.92
          3 |          5        0.05       99.97
          4 |          2        0.02       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017