Frequencies for first 10,000 rows of refmdcad variable in namcs2004 dataset :

 difficulty |
  referring |
   medicaid |
    pat for |
    consult |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        379        3.79        3.79
          1 |      1,294       12.94       16.73
          2 |      1,565       15.65       32.38
          3 |      1,458       14.58       46.96
          4 |      3,619       36.19       83.15
          5 |      1,685       16.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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