Frequencies for mdc variable in drg2mdcxw2004 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         14        2.69        2.69
          1 |         42        8.08       10.77
          2 |         13        2.50       13.27
          3 |         31        5.96       19.23
          4 |         29        5.58       24.81
          5 |         52       10.00       34.81
          6 |         40        7.69       42.50
          7 |         20        3.85       46.35
          8 |         57       10.96       57.31
          9 |         28        5.38       62.69
         10 |         17        3.27       65.96
         11 |         32        6.15       72.12
         12 |         19        3.65       75.77
         13 |         17        3.27       79.04
         14 |         15        2.88       81.92
         15 |          7        1.35       83.27
         16 |          8        1.54       84.81
         17 |         18        3.46       88.27
         18 |          9        1.73       90.00
         19 |          9        1.73       91.73
         20 |          4        0.77       92.50
         21 |         17        3.27       95.77
         22 |          8        1.54       97.31
         23 |          7        1.35       98.65
         24 |          4        0.77       99.42
         25 |          3        0.58      100.00
------------+-----------------------------------
      Total |        520      100.00

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