Frequencies for mdc variable in drg2002 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        2.29        2.29
          1 |         35        6.69        8.99
          2 |         13        2.49       11.47
          3 |         31        5.93       17.40
          4 |         29        5.54       22.94
          5 |         49        9.37       32.31
          6 |         40        7.65       39.96
          7 |         20        3.82       43.79
          8 |         56       10.71       54.49
          9 |         28        5.35       59.85
         10 |         17        3.25       63.10
         11 |         32        6.12       69.22
         12 |         19        3.63       72.85
         13 |         17        3.25       76.10
         14 |         15        2.87       78.97
         15 |          7        1.34       80.31
         16 |          8        1.53       81.84
         17 |         17        3.25       85.09
         18 |          9        1.72       86.81
         19 |          9        1.72       88.53
         20 |          4        0.76       89.29
         21 |         17        3.25       92.54
         22 |          8        1.53       94.07
         23 |          7        1.34       95.41
         24 |          4        0.76       96.18
         25 |          3        0.57       96.75
          . |         17        3.25      100.00
------------+-----------------------------------
      Total |        523      100.00

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