Frequencies for first 10,000 rows of refmdcad variable in namcs2005 dataset :

 difficulty |
         in |
  referring |
   medicaid |
   patients |
        for |
  specialty |
consultatio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         37        0.37        0.37
          1 |      1,873       18.73       19.10
          2 |      2,288       22.88       41.98
          3 |        835        8.35       50.33
          4 |      2,909       29.09       79.42
          5 |        608        6.08       85.50
          6 |      1,450       14.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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