Frequencies for mdc variable in drg2mdcxw1997 dataset :

      Major |
 Diagnostic |
   Category |
      (MDC) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         10        2.02        2.02
          1 |         35        7.06        9.07
          2 |         13        2.62       11.69
          3 |         31        6.25       17.94
          4 |         29        5.85       23.79
          5 |         44        8.87       32.66
          6 |         40        8.06       40.73
          7 |         20        4.03       44.76
          8 |         54       10.89       55.65
          9 |         28        5.65       61.29
         10 |         17        3.43       64.72
         11 |         32        6.45       71.17
         12 |         19        3.83       75.00
         13 |         17        3.43       78.43
         14 |         15        3.02       81.45
         15 |          7        1.41       82.86
         16 |          8        1.61       84.48
         17 |         17        3.43       87.90
         18 |          9        1.81       89.72
         19 |          9        1.81       91.53
         20 |          5        1.01       92.54
         21 |         17        3.43       95.97
         22 |          6        1.21       97.18
         23 |          7        1.41       98.59
         24 |          4        0.81       99.40
         25 |          3        0.60      100.00
------------+-----------------------------------
      Total |        496      100.00

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