Frequencies for first 10,000 rows of proc42d variable in namcs1993 dataset :

 service #4 |
  procedure |
   code - 2 |
     digits |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,945       99.45       99.45
         03 |          1        0.01       99.46
         37 |          1        0.01       99.47
         38 |          1        0.01       99.48
         45 |          1        0.01       99.49
         70 |          1        0.01       99.50
         87 |          8        0.08       99.58
         88 |          8        0.08       99.66
         89 |          9        0.09       99.75
         91 |          1        0.01       99.76
         92 |          2        0.02       99.78
         93 |         21        0.21       99.99
         95 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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