Frequencies for first 10,000 rows of cholest variable in namcs2005 dataset :

lipids/chol |
    esterol |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,009       90.09       90.09
          1 |        991        9.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016