Frequencies for mdc variable in drg2mdcxw2002 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        2.35        2.35
          1 |         36        7.06        9.41
          2 |         13        2.55       11.96
          3 |         31        6.08       18.04
          4 |         29        5.69       23.73
          5 |         52       10.20       33.92
          6 |         40        7.84       41.76
          7 |         20        3.92       45.69
          8 |         56       10.98       56.67
          9 |         28        5.49       62.16
         10 |         17        3.33       65.49
         11 |         32        6.27       71.76
         12 |         19        3.73       75.49
         13 |         17        3.33       78.82
         14 |         15        2.94       81.76
         15 |          7        1.37       83.14
         16 |          8        1.57       84.71
         17 |         17        3.33       88.04
         18 |          9        1.76       89.80
         19 |          9        1.76       91.57
         20 |          4        0.78       92.35
         21 |         17        3.33       95.69
         22 |          8        1.57       97.25
         23 |          7        1.37       98.63
         24 |          4        0.78       99.41
         25 |          3        0.59      100.00
------------+-----------------------------------
      Total |        510      100.00

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