Frequencies for first 10,000 rows of scopewi1 variable in nhamcsopd2005 dataset :

      scope |
  procedure |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,821       98.21       98.21
       1811 |          1        0.01       98.22
       2219 |          1        0.01       98.23
       3142 |          3        0.03       98.26
       3323 |          2        0.02       98.28
       4513 |         19        0.19       98.47
       4523 |         81        0.81       99.28
       4524 |          1        0.01       99.29
       5421 |          8        0.08       99.37
       5521 |          1        0.01       99.38
       5631 |          2        0.02       99.40
       5732 |         17        0.17       99.57
       6812 |          3        0.03       99.60
       7021 |         32        0.32       99.92
       8021 |          1        0.01       99.93
       8026 |          2        0.02       99.95
       9999 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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