Frequencies for first 10,000 rows of mhp variable in nhamcsopd2009 dataset :

     mental |
     health |
   provider |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,543       95.43       95.43
        yes |        457        4.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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