Frequencies for first 10,000 rows of pct012m045 variable in sf12010860us32 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,788       97.88       97.88
          1 |        186        1.86       99.74
          2 |         24        0.24       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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