Frequencies for first 10,000 rows of scpwi12d variable in nhamcsopd2002 dataset :

      scope |
  procedure |
write-in #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,858       98.58       98.58
         18 |          1        0.01       98.59
         22 |          4        0.04       98.63
         31 |          6        0.06       98.69
         33 |          2        0.02       98.71
         44 |          2        0.02       98.73
         45 |         58        0.58       99.31
         48 |          7        0.07       99.38
         49 |          1        0.01       99.39
         54 |          1        0.01       99.40
         57 |         19        0.19       99.59
         68 |         10        0.10       99.69
         70 |         24        0.24       99.93
         95 |          1        0.01       99.94
         99 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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