Frequencies for first 10,000 rows of pct012m021 variable in sf12010860us32 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,791       97.91       97.91
          1 |        177        1.77       99.68
          2 |         24        0.24       99.92
          3 |          4        0.04       99.96
          4 |          1        0.01       99.97
          5 |          1        0.01       99.98
          6 |          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