Frequencies for mdc variable in drg2mdcxw1995 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         10        2.03        2.03
          1 |         35        7.11        9.15
          2 |         13        2.64       11.79
          3 |         31        6.30       18.09
          4 |         29        5.89       23.98
          5 |         44        8.94       32.93
          6 |         40        8.13       41.06
          7 |         20        4.07       45.12
          8 |         50       10.16       55.28
          9 |         28        5.69       60.98
         10 |         17        3.46       64.43
         11 |         32        6.50       70.93
         12 |         19        3.86       74.80
         13 |         17        3.46       78.25
         14 |         15        3.05       81.30
         15 |          7        1.42       82.72
         16 |          8        1.63       84.35
         17 |         17        3.46       87.80
         18 |          9        1.83       89.63
         19 |          9        1.83       91.46
         20 |          5        1.02       92.48
         21 |         17        3.46       95.93
         22 |          6        1.22       97.15
         23 |          7        1.42       98.58
         24 |          4        0.81       99.39
         25 |          3        0.61      100.00
------------+-----------------------------------
      Total |        492      100.00

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