Frequencies for first 10,000 rows of pct012m033 variable in sf12010880us32 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,799       97.99       97.99
          1 |        180        1.80       99.79
          2 |         17        0.17       99.96
          3 |          2        0.02       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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