Frequencies for carotidendarterectomyper1000medi variable in 2009_surg_discharg

    Carotid |
Endarterect |
    omy per |
       1000 |
   Medicare |
  Enrollees |
       2009 |      Freq.     Percent        Cum.
------------+-----------------------------------
        .43 |          1        1.92        1.92
        .88 |          1        1.92        3.85
        .97 |          1        1.92        5.77
       1.08 |          1        1.92        7.69
       1.24 |          1        1.92        9.62
       1.26 |          1        1.92       11.54
       1.48 |          1        1.92       13.46
        1.5 |          2        3.85       17.31
        1.6 |          1        1.92       19.23
       1.61 |          1        1.92       21.15
       1.65 |          1        1.92       23.08
       1.66 |          1        1.92       25.00
       1.68 |          1        1.92       26.92
       1.75 |          1        1.92       28.85
       1.78 |          1        1.92       30.77
       1.79 |          2        3.85       34.62
       1.83 |          1        1.92       36.54
       1.84 |          1        1.92       38.46
       1.88 |          1        1.92       40.38
       1.92 |          1        1.92       42.31
       1.95 |          1        1.92       44.23
       1.98 |          1        1.92       46.15
          2 |          2        3.85       50.00
       2.02 |          1        1.92       51.92
       2.04 |          1        1.92       53.85
       2.09 |          1        1.92       55.77
       2.12 |          1        1.92       57.69
       2.14 |          1        1.92       59.62
       2.16 |          1        1.92       61.54
       2.27 |          1        1.92       63.46
       2.28 |          1        1.92       65.38
       2.29 |          1        1.92       67.31
        2.3 |          1        1.92       69.23
       2.34 |          2        3.85       73.08
       2.38 |          1        1.92       75.00
       2.41 |          1        1.92       76.92
       2.42 |          1        1.92       78.85
       2.43 |          1        1.92       80.77
       2.56 |          1        1.92       82.69
       2.62 |          1        1.92       84.62
       2.66 |          1        1.92       86.54
       2.75 |          1        1.92       88.46
       2.81 |          1        1.92       90.38
        2.9 |          1        1.92       92.31
       3.07 |          2        3.85       96.15
       3.08 |          1        1.92       98.08
       3.32 |          1        1.92      100.00
------------+-----------------------------------
      Total |         52      100.00

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