Frequencies for first 10,000 rows of digsc12d variable in namcs2007 dataset :

 diagnostic |
 service #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      8,561       85.61       85.61
         21 |          1        0.01       85.62
         37 |          1        0.01       85.63
         38 |          1        0.01       85.64
         42 |          1        0.01       85.65
         57 |          1        0.01       85.66
         75 |          2        0.02       85.68
         78 |          1        0.01       85.69
         81 |          2        0.02       85.71
         86 |         33        0.33       86.04
         87 |         14        0.14       86.18
         88 |         23        0.23       86.41
         89 |        751        7.51       93.92
         90 |        269        2.69       96.61
         91 |        116        1.16       97.77
         92 |          6        0.06       97.83
         93 |         23        0.23       98.06
         94 |          6        0.06       98.12
         95 |        108        1.08       99.20
         96 |          5        0.05       99.25
         97 |          2        0.02       99.27
         99 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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