Frequencies for mdc variable in drg2mdcxw2007 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         24        3.22        3.22
          1 |         75       10.07       13.29
          2 |         10        1.34       14.63
          3 |         25        3.36       17.99
          4 |         40        5.37       23.36
          5 |         87       11.68       35.03
          6 |         61        8.19       43.22
          7 |         36        4.83       48.05
          8 |         99       13.29       61.34
          9 |         29        3.89       65.23
         10 |         26        3.49       68.72
         11 |         43        5.77       74.50
         12 |         21        2.82       77.32
         13 |         25        3.36       80.67
         14 |         15        2.01       82.68
         15 |          7        0.94       83.62
         16 |         15        2.01       85.64
         17 |         27        3.62       89.26
         18 |         17        2.28       91.54
         19 |          9        1.21       92.75
         20 |          4        0.54       93.29
         21 |         20        2.68       95.97
         22 |          6        0.81       96.78
         23 |         10        1.34       98.12
         24 |          8        1.07       99.19
         25 |          6        0.81      100.00
------------+-----------------------------------
      Total |        745      100.00

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