Frequencies for first 10,000 rows of pct012m135 variable in sf12010860us32 dataset :

   28 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,749       97.49       97.49
          1 |        220        2.20       99.69
          2 |         24        0.24       99.93
          3 |          5        0.05       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