Frequencies for first 10,000 rows of depress variable in nhamcsopd2011 dataset :

 Depression |
  screening |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,773       97.73       97.73
        Yes |        227        2.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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