Frequencies for first 10,000 rows of scpwi12d variable in nhamcsopd2006 dataset :

      scope |
  procedure |
     #1 - 2 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,744       97.44       97.44
         22 |          2        0.02       97.46
         31 |          1        0.01       97.47
         33 |          6        0.06       97.53
         45 |        149        1.49       99.02
         48 |          1        0.01       99.03
         49 |          2        0.02       99.05
         51 |          5        0.05       99.10
         54 |          6        0.06       99.16
         56 |          2        0.02       99.18
         57 |         25        0.25       99.43
         68 |         25        0.25       99.68
         70 |         25        0.25       99.93
         80 |          3        0.03       99.96
         89 |          1        0.01       99.97
         99 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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