Frequencies for mdc variable in drg1993 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          9        1.83        1.83
          1 |         35        7.11        8.94
          2 |         13        2.64       11.59
          3 |         31        6.30       17.89
          4 |         29        5.89       23.78
          5 |         44        8.94       32.72
          6 |         40        8.13       40.85
          7 |         18        3.66       44.51
          8 |         50       10.16       54.67
          9 |         28        5.69       60.37
         10 |         17        3.46       63.82
         11 |         32        6.50       70.33
         12 |         19        3.86       74.19
         13 |         17        3.46       77.64
         14 |         15        3.05       80.69
         15 |          7        1.42       82.11
         16 |          8        1.63       83.74
         17 |         17        3.46       87.20
         18 |          9        1.83       89.02
         19 |          9        1.83       90.85
         20 |          5        1.02       91.87
         21 |         17        3.46       95.33
         22 |          6        1.22       96.54
         23 |          7        1.42       97.97
         24 |          4        0.81       98.78
         25 |          3        0.61       99.39
          . |          3        0.61      100.00
------------+-----------------------------------
      Total |        492      100.00

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