Frequencies for mdc variable in drg1998 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         10        1.99        1.99
          1 |         35        6.96        8.95
          2 |         13        2.58       11.53
          3 |         31        6.16       17.69
          4 |         29        5.77       23.46
          5 |         45        8.95       32.41
          6 |         40        7.95       40.36
          7 |         20        3.98       44.33
          8 |         54       10.74       55.07
          9 |         28        5.57       60.64
         10 |         17        3.38       64.02
         11 |         32        6.36       70.38
         12 |         19        3.78       74.16
         13 |         17        3.38       77.53
         14 |         15        2.98       80.52
         15 |          7        1.39       81.91
         16 |          8        1.59       83.50
         17 |         17        3.38       86.88
         18 |          9        1.79       88.67
         19 |          9        1.79       90.46
         20 |          5        0.99       91.45
         21 |         17        3.38       94.83
         23 |          7        1.39       96.22
         24 |          4        0.80       97.02
         25 |          3        0.60       97.61
          . |         12        2.39      100.00
------------+-----------------------------------
      Total |        503      100.00

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