Frequencies for kneereplacementper1000medicareen variable in 2009_surg_discharg

       Knee |
Replacement |
   per 1000 |
   Medicare |
  Enrollees |
       2009 |      Freq.     Percent        Cum.
------------+-----------------------------------
       3.35 |          1        1.92        1.92
       5.91 |          1        1.92        3.85
       6.48 |          1        1.92        5.77
       6.83 |          1        1.92        7.69
       7.05 |          1        1.92        9.62
       7.13 |          1        1.92       11.54
       7.17 |          1        1.92       13.46
       7.29 |          1        1.92       15.38
        7.6 |          1        1.92       17.31
       7.73 |          1        1.92       19.23
       7.76 |          1        1.92       21.15
       7.87 |          1        1.92       23.08
       7.96 |          1        1.92       25.00
       7.98 |          1        1.92       26.92
       8.17 |          1        1.92       28.85
       8.28 |          1        1.92       30.77
       8.41 |          1        1.92       32.69
       8.42 |          1        1.92       34.62
       8.49 |          1        1.92       36.54
       8.57 |          1        1.92       38.46
       8.58 |          1        1.92       40.38
       8.62 |          1        1.92       42.31
       8.66 |          1        1.92       44.23
       8.72 |          1        1.92       46.15
       8.73 |          1        1.92       48.08
       8.77 |          1        1.92       50.00
       8.87 |          1        1.92       51.92
       8.92 |          1        1.92       53.85
       8.97 |          1        1.92       55.77
       9.08 |          1        1.92       57.69
       9.23 |          1        1.92       59.62
       9.24 |          1        1.92       61.54
       9.28 |          1        1.92       63.46
       9.42 |          1        1.92       65.38
        9.6 |          1        1.92       67.31
       9.64 |          1        1.92       69.23
       9.92 |          1        1.92       71.15
      10.11 |          1        1.92       73.08
      10.19 |          1        1.92       75.00
      10.31 |          1        1.92       76.92
      10.43 |          1        1.92       78.85
      10.68 |          1        1.92       80.77
      10.73 |          1        1.92       82.69
      10.83 |          1        1.92       84.62
      10.93 |          1        1.92       86.54
      11.62 |          1        1.92       88.46
      11.95 |          1        1.92       90.38
      12.14 |          1        1.92       92.31
      12.16 |          1        1.92       94.23
      12.26 |          1        1.92       96.15
       12.9 |          1        1.92       98.08
       13.1 |          1        1.92      100.00
------------+-----------------------------------
      Total |         52      100.00

by Jean Roth , jroth@nber.org , 14 Mar 2018