Frequencies for first 10,000 rows of proc12d variable in nhamcsopd1993 dataset :

 service #1 |
  procedure |
   code - 2 |
     digits |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      6,066       60.66       60.66
         02 |          1        0.01       60.67
         03 |         16        0.16       60.83
         04 |          8        0.08       60.91
         05 |          3        0.03       60.94
         06 |          2        0.02       60.96
         08 |          3        0.03       60.99
         09 |          1        0.01       61.00
         12 |         12        0.12       61.12
         13 |         26        0.26       61.38
         14 |          5        0.05       61.43
         16 |          2        0.02       61.45
         18 |         10        0.10       61.55
         20 |          3        0.03       61.58
         21 |          4        0.04       61.62
         22 |          1        0.01       61.63
         23 |          1        0.01       61.64
         24 |          1        0.01       61.65
         27 |          2        0.02       61.67
         28 |          8        0.08       61.75
         31 |          5        0.05       61.80
         33 |          1        0.01       61.81
         34 |          1        0.01       61.82
         37 |          3        0.03       61.85
         39 |          3        0.03       61.88
         41 |         12        0.12       62.00
         42 |          6        0.06       62.06
         43 |          1        0.01       62.07
         44 |         19        0.19       62.26
         45 |        106        1.06       63.32
         48 |         15        0.15       63.47
         50 |          2        0.02       63.49
         53 |          5        0.05       63.54
         54 |          4        0.04       63.58
         55 |          3        0.03       63.61
         56 |          1        0.01       63.62
         57 |          4        0.04       63.66
         58 |          1        0.01       63.67
         60 |          4        0.04       63.71
         64 |          5        0.05       63.76
         65 |          2        0.02       63.78
         66 |          6        0.06       63.84
         67 |         11        0.11       63.95
         68 |          3        0.03       63.98
         69 |         10        0.10       64.08
         70 |         18        0.18       64.26
         71 |          2        0.02       64.28
         73 |          2        0.02       64.30
         75 |         45        0.45       64.75
         76 |          1        0.01       64.76
         77 |          5        0.05       64.81
         78 |          1        0.01       64.82
         79 |          2        0.02       64.84
         80 |         15        0.15       64.99
         81 |          8        0.08       65.07
         82 |          2        0.02       65.09
         83 |          4        0.04       65.13
         85 |         13        0.13       65.26
         86 |         83        0.83       66.09
         87 |        430        4.30       70.39
         88 |        632        6.32       76.71
         89 |        419        4.19       80.90
         90 |        132        1.32       82.22
         91 |        372        3.72       85.94
         92 |         35        0.35       86.29
         93 |        235        2.35       88.64
         94 |        464        4.64       93.28
         95 |        211        2.11       95.39
         96 |         32        0.32       95.71
         97 |         74        0.74       96.45
         98 |          2        0.02       96.47
         99 |        353        3.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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