Frequencies for first 10,000 rows of edhiv variable in nhamcsed2009 dataset :

       does |
    patient |
  have: hiv |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,940       99.40       99.40
          1 |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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