Frequencies for first 10,000 rows of proc52d variable in nhamcsopd2010 dataset :

procedure 5 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,961       99.61       99.61
         45 |          1        0.01       99.62
         51 |          1        0.01       99.63
         53 |          4        0.04       99.67
         57 |          1        0.01       99.68
         59 |          1        0.01       99.69
         85 |          1        0.01       99.70
         86 |          5        0.05       99.75
         88 |          1        0.01       99.76
         89 |         19        0.19       99.95
         91 |          1        0.01       99.96
         93 |          1        0.01       99.97
         95 |          1        0.01       99.98
         97 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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