Frequencies for first 10,000 rows of pct012m052 variable in sf12000860us28 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,886       98.86       98.86
          1 |        107        1.07       99.93
          2 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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