Frequencies for mdc variable in drg2006 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         14        2.50        2.50
          1 |         40        7.16        9.66
          2 |         13        2.33       11.99
          3 |         31        5.55       17.53
          4 |         28        5.01       22.54
          5 |         55        9.84       32.38
          6 |         38        6.80       39.18
          7 |         20        3.58       42.75
          8 |         59       10.55       53.31
          9 |         28        5.01       58.32
         10 |         17        3.04       61.36
         11 |         32        5.72       67.08
         12 |         19        3.40       70.48
         13 |         17        3.04       73.52
         14 |         15        2.68       76.21
         15 |          7        1.25       77.46
         16 |          8        1.43       78.89
         17 |         18        3.22       82.11
         18 |          7        1.25       83.36
         19 |          9        1.61       84.97
         20 |          4        0.72       85.69
         21 |         17        3.04       88.73
         22 |          8        1.43       90.16
         23 |          7        1.25       91.41
         24 |          4        0.72       92.13
         25 |          3        0.54       92.67
          . |         41        7.33      100.00
------------+-----------------------------------
      Total |        559      100.00

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