Frequencies for first 10,000 rows of pct012m030 variable in sf12010860us32 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,713       97.13       97.13
          1 |        239        2.39       99.52
          2 |         37        0.37       99.89
          3 |         10        0.10       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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