Frequencies for mdc variable in drg2mdcxw2005 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         14        2.66        2.66
          1 |         43        8.17       10.84
          2 |         13        2.47       13.31
          3 |         31        5.89       19.20
          4 |         29        5.51       24.71
          5 |         55       10.46       35.17
          6 |         40        7.60       42.78
          7 |         20        3.80       46.58
          8 |         59       11.22       57.79
          9 |         28        5.32       63.12
         10 |         17        3.23       66.35
         11 |         32        6.08       72.43
         12 |         19        3.61       76.05
         13 |         17        3.23       79.28
         14 |         15        2.85       82.13
         15 |          7        1.33       83.46
         16 |          8        1.52       84.98
         17 |         18        3.42       88.40
         18 |          9        1.71       90.11
         19 |          9        1.71       91.83
         20 |          4        0.76       92.59
         21 |         17        3.23       95.82
         22 |          8        1.52       97.34
         23 |          7        1.33       98.67
         24 |          4        0.76       99.43
         25 |          3        0.57      100.00
------------+-----------------------------------
      Total |        526      100.00

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