Frequencies for mdc variable in drg2004 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        2.22        2.22
          1 |         41        7.59        9.81
          2 |         13        2.41       12.22
          3 |         31        5.74       17.96
          4 |         29        5.37       23.33
          5 |         52        9.63       32.96
          6 |         40        7.41       40.37
          7 |         20        3.70       44.07
          8 |         57       10.56       54.63
          9 |         28        5.19       59.81
         10 |         17        3.15       62.96
         11 |         32        5.93       68.89
         12 |         19        3.52       72.41
         13 |         17        3.15       75.56
         14 |         15        2.78       78.33
         15 |          7        1.30       79.63
         16 |          8        1.48       81.11
         17 |         18        3.33       84.44
         18 |          9        1.67       86.11
         19 |          9        1.67       87.78
         20 |          4        0.74       88.52
         21 |         17        3.15       91.67
         22 |          8        1.48       93.15
         23 |          7        1.30       94.44
         24 |          4        0.74       95.19
         25 |          3        0.56       95.74
          . |         23        4.26      100.00
------------+-----------------------------------
      Total |        540      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016