Frequencies for first 10,000 rows of pct012m160 variable in sf12010860us32 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,814       98.14       98.14
          1 |        170        1.70       99.84
          2 |         14        0.14       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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