Frequencies for first 10,000 rows of depress variable in nhamcsopd1995 dataset :

       does |
    patient |
     have - |
 depression |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,352       93.52       93.52
          1 |        648        6.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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