Frequencies for mdc variable in drg2mdcxw2003 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         13        2.51        2.51
          1 |         41        7.92       10.42
          2 |         13        2.51       12.93
          3 |         31        5.98       18.92
          4 |         29        5.60       24.52
          5 |         52       10.04       34.56
          6 |         40        7.72       42.28
          7 |         20        3.86       46.14
          8 |         57       11.00       57.14
          9 |         28        5.41       62.55
         10 |         17        3.28       65.83
         11 |         32        6.18       72.01
         12 |         19        3.67       75.68
         13 |         17        3.28       78.96
         14 |         15        2.90       81.85
         15 |          7        1.35       83.20
         16 |          8        1.54       84.75
         17 |         18        3.47       88.22
         18 |          9        1.74       89.96
         19 |          9        1.74       91.70
         20 |          4        0.77       92.47
         21 |         17        3.28       95.75
         22 |          8        1.54       97.30
         23 |          7        1.35       98.65
         24 |          4        0.77       99.42
         25 |          3        0.58      100.00
------------+-----------------------------------
      Total |        518      100.00

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