Frequencies for first 10,000 rows of amb12 variable in namcs1996 dataset :

 ambulatory |
   surgical |
proc #1 - 2 |
        dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,434       94.34       94.34
         03 |          3        0.03       94.37
         04 |          4        0.04       94.41
         08 |          4        0.04       94.45
         10 |          1        0.01       94.46
         11 |          1        0.01       94.47
         12 |          2        0.02       94.49
         13 |          3        0.03       94.52
         14 |         14        0.14       94.66
         16 |         19        0.19       94.85
         18 |          6        0.06       94.91
         20 |          5        0.05       94.96
         21 |          9        0.09       95.05
         22 |          6        0.06       95.11
         27 |          1        0.01       95.12
         28 |          2        0.02       95.14
         31 |          4        0.04       95.18
         34 |          2        0.02       95.20
         37 |          4        0.04       95.24
         38 |          2        0.02       95.26
         39 |          1        0.01       95.27
         44 |          2        0.02       95.29
         45 |         44        0.44       95.73
         48 |          8        0.08       95.81
         49 |          6        0.06       95.87
         51 |          2        0.02       95.89
         53 |          1        0.01       95.90
         54 |          1        0.01       95.91
         57 |         20        0.20       96.11
         58 |          4        0.04       96.15
         60 |          1        0.01       96.16
         63 |          6        0.06       96.22
         67 |          2        0.02       96.24
         68 |          6        0.06       96.30
         69 |          6        0.06       96.36
         70 |          3        0.03       96.39
         77 |          1        0.01       96.40
         79 |          6        0.06       96.46
         80 |          2        0.02       96.48
         81 |         21        0.21       96.69
         82 |          4        0.04       96.73
         83 |          8        0.08       96.81
         85 |          5        0.05       96.86
         86 |        235        2.35       99.21
         92 |          1        0.01       99.22
         93 |          9        0.09       99.31
         96 |         22        0.22       99.53
         97 |         32        0.32       99.85
         98 |          2        0.02       99.87
         99 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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