Frequencies for first 10,000 rows of proc53d variable in nhamcsopd2009 dataset :

procedure 5 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,979       99.79       99.79
        451 |          1        0.01       99.80
        452 |          1        0.01       99.81
        494 |          1        0.01       99.82
        876 |          1        0.01       99.83
        885 |          1        0.01       99.84
        891 |         10        0.10       99.94
        930 |          3        0.03       99.97
        932 |          1        0.01       99.98
        938 |          1        0.01       99.99
        939 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016