Frequencies for first 10,000 rows of pct012m153 variable in sf12000860us28 dataset :

   46 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,829       98.29       98.29
          1 |        157        1.57       99.86
          2 |         11        0.11       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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