Frequencies for first 10,000 rows of pct012m178 variable in sf12010860us32 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,952       99.52       99.52
          1 |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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