Frequencies for first 10,000 rows of scopewi2 variable in nhamcsopd2005 dataset :

      scope |
  procedure |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,995       99.95       99.95
       4513 |          1        0.01       99.96
       4523 |          2        0.02       99.98
       4524 |          1        0.01       99.99
       5732 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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