Frequencies for mdc variable in drg2005 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         14        2.58        2.58
          1 |         42        7.73       10.31
          2 |         13        2.39       12.71
          3 |         31        5.71       18.42
          4 |         29        5.34       23.76
          5 |         43        7.92       31.68
          6 |         40        7.37       39.04
          7 |         20        3.68       42.73
          8 |         56       10.31       53.04
          9 |         28        5.16       58.20
         10 |         17        3.13       61.33
         11 |         32        5.89       67.22
         12 |         19        3.50       70.72
         13 |         17        3.13       73.85
         14 |         15        2.76       76.61
         15 |          7        1.29       77.90
         16 |          8        1.47       79.37
         17 |         18        3.31       82.69
         18 |          9        1.66       84.35
         19 |          9        1.66       86.00
         20 |          4        0.74       86.74
         21 |         17        3.13       89.87
         22 |          8        1.47       91.34
         23 |          7        1.29       92.63
         24 |          4        0.74       93.37
         25 |          3        0.55       93.92
          . |         33        6.08      100.00
------------+-----------------------------------
      Total |        543      100.00

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