Frequencies for first 10,000 rows of proc42d variable in namcs1994 dataset :

 service #4 |
  procedure |
   code - 2 |
     digits |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,932       99.32       99.32
         29 |          1        0.01       99.33
         45 |          2        0.02       99.35
         75 |          1        0.01       99.36
         87 |         13        0.13       99.49
         88 |         13        0.13       99.62
         89 |          9        0.09       99.71
         90 |          2        0.02       99.73
         91 |          6        0.06       99.79
         92 |          2        0.02       99.81
         93 |          6        0.06       99.87
         95 |          9        0.09       99.96
         96 |          2        0.02       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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