Frequencies for first 10,000 rows of mhp variable in nhamcsopd2008 dataset :

     mental |
     health |
   provider |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,828       98.28       98.28
        yes |        172        1.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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