Frequencies for first 10,000 rows of amb12 variable in nhamcsopd1996 dataset :

 ambulatory |
   surgical |
proc #1 - 2 |
        dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,186       91.86       91.86
         02 |          1        0.01       91.87
         03 |         23        0.23       92.10
         04 |          1        0.01       92.11
         05 |          1        0.01       92.12
         06 |          1        0.01       92.13
         08 |          5        0.05       92.18
         09 |          2        0.02       92.20
         12 |          1        0.01       92.21
         13 |         23        0.23       92.44
         14 |          5        0.05       92.49
         18 |          3        0.03       92.52
         20 |          7        0.07       92.59
         21 |          7        0.07       92.66
         23 |          8        0.08       92.74
         24 |          6        0.06       92.80
         27 |          1        0.01       92.81
         28 |          2        0.02       92.83
         31 |          6        0.06       92.89
         33 |          5        0.05       92.94
         34 |          2        0.02       92.96
         37 |          1        0.01       92.97
         38 |          8        0.08       93.05
         39 |          1        0.01       93.06
         41 |          3        0.03       93.09
         42 |          3        0.03       93.12
         44 |         21        0.21       93.33
         45 |        159        1.59       94.92
         48 |         16        0.16       95.08
         49 |          3        0.03       95.11
         50 |          4        0.04       95.15
         51 |          3        0.03       95.18
         53 |         14        0.14       95.32
         54 |         12        0.12       95.44
         55 |          2        0.02       95.46
         56 |          1        0.01       95.47
         57 |         18        0.18       95.65
         60 |          1        0.01       95.66
         63 |          2        0.02       95.68
         64 |          3        0.03       95.71
         66 |          4        0.04       95.75
         67 |         11        0.11       95.86
         68 |         10        0.10       95.96
         69 |         16        0.16       96.12
         70 |         28        0.28       96.40
         71 |          5        0.05       96.45
         74 |          1        0.01       96.46
         75 |         16        0.16       96.62
         77 |          2        0.02       96.64
         78 |          2        0.02       96.66
         79 |          4        0.04       96.70
         80 |          5        0.05       96.75
         81 |         13        0.13       96.88
         83 |          1        0.01       96.89
         84 |          1        0.01       96.90
         85 |         22        0.22       97.12
         86 |        150        1.50       98.62
         87 |          1        0.01       98.63
         89 |          2        0.02       98.65
         92 |          1        0.01       98.66
         93 |         16        0.16       98.82
         94 |          6        0.06       98.88
         96 |         22        0.22       99.10
         97 |         72        0.72       99.82
         98 |          5        0.05       99.87
         99 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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