Frequencies for first 10,000 rows of pct012m043 variable in sf12000860us28 dataset :

   40 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,785       97.85       97.85
          1 |        194        1.94       99.79
          2 |         19        0.19       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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