Frequencies for first 10,000 rows of cholest variable in nhamcsopd1997 dataset :

cholesterol |
    measure |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,730       97.30       97.30
          1 |        270        2.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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