Frequencies for first 10,000 rows of pct012k032 variable in sf12010880us30 dataset :

   29 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,244       92.44       92.44
          1 |        579        5.79       98.23
          2 |        112        1.12       99.35
          3 |         37        0.37       99.72
          4 |         16        0.16       99.88
          5 |          5        0.05       99.93
          6 |          6        0.06       99.99
         29 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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