Frequencies for first 10,000 rows of refmdcad variable in namcs2006 dataset :

      difficulty in |
 referring medicaid |
       patients for |
          specialty |
       consultation |      Freq.     Percent        Cum.
--------------------+-----------------------------------
              blank |        117        1.17        1.17
a lot of difficulty |      1,730       17.30       18.47
    some difficulty |      2,115       21.15       39.62
  little difficulty |        939        9.39       49.01
      no difficulty |      2,988       29.88       78.89
         don`t know |        491        4.91       83.80
     not applicable |      1,620       16.20      100.00
--------------------+-----------------------------------
              Total |     10,000      100.00

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