Frequencies for first 10,000 rows of proc43d variable in nhamcsopd2010 dataset :

procedure 4 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,845       98.45       98.45
        482 |          1        0.01       98.46
        512 |          1        0.01       98.47
        549 |          1        0.01       98.48
        861 |          3        0.03       98.51
        862 |          1        0.01       98.52
        891 |          7        0.07       98.59
        892 |          1        0.01       98.60
        893 |         83        0.83       99.43
        894 |          1        0.01       99.44
        895 |         19        0.19       99.63
        930 |          3        0.03       99.66
        939 |          2        0.02       99.68
        950 |         27        0.27       99.95
        952 |          1        0.01       99.96
        954 |          2        0.02       99.98
        994 |          1        0.01       99.99
        999 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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