Frequencies for first 10,000 rows of proc22d variable in namcs1993 dataset :

 service #2 |
  procedure |
   code - 2 |
     digits |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,189       91.89       91.89
         08 |          2        0.02       91.91
         12 |          1        0.01       91.92
         20 |          1        0.01       91.93
         22 |          1        0.01       91.94
         27 |          1        0.01       91.95
         38 |          2        0.02       91.97
         39 |          2        0.02       91.99
         40 |          1        0.01       92.00
         41 |          1        0.01       92.01
         42 |          1        0.01       92.02
         45 |         15        0.15       92.17
         48 |          2        0.02       92.19
         49 |          5        0.05       92.24
         50 |          1        0.01       92.25
         51 |          4        0.04       92.29
         53 |          5        0.05       92.34
         57 |          1        0.01       92.35
         58 |          1        0.01       92.36
         66 |          1        0.01       92.37
         67 |          6        0.06       92.43
         68 |          1        0.01       92.44
         70 |          1        0.01       92.45
         71 |          2        0.02       92.47
         75 |          3        0.03       92.50
         81 |          2        0.02       92.52
         82 |          1        0.01       92.53
         83 |          2        0.02       92.55
         85 |         13        0.13       92.68
         86 |         26        0.26       92.94
         87 |        155        1.55       94.49
         88 |        117        1.17       95.66
         89 |        162        1.62       97.28
         90 |         35        0.35       97.63
         91 |         45        0.45       98.08
         92 |          8        0.08       98.16
         93 |        101        1.01       99.17
         94 |         12        0.12       99.29
         95 |         35        0.35       99.64
         96 |          6        0.06       99.70
         97 |          5        0.05       99.75
         98 |          2        0.02       99.77
         99 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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