Frequencies for first 10,000 rows of scpwi12d variable in nhamcsopd2005 dataset :

      scope |
  procedure |
     #1 - 2 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,821       98.21       98.21
         18 |          1        0.01       98.22
         22 |          1        0.01       98.23
         31 |          3        0.03       98.26
         33 |          2        0.02       98.28
         45 |        101        1.01       99.29
         54 |          8        0.08       99.37
         55 |          1        0.01       99.38
         56 |          2        0.02       99.40
         57 |         17        0.17       99.57
         68 |          3        0.03       99.60
         70 |         32        0.32       99.92
         80 |          3        0.03       99.95
         99 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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