Frequencies for first 10,000 rows of pct012m136 variable in sf12000860us28 dataset :

   29 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,759       97.59       97.59
          1 |        220        2.20       99.79
          2 |         16        0.16       99.95
          3 |          4        0.04       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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