Frequencies for first 10,000 rows of scopwi1r variable in namcs2001 dataset :

      scope |
  procedure |
write-in #1 |
   - recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,712       97.12       97.12
       1229 |          4        0.04       97.16
       1811 |          1        0.01       97.17
       2121 |          1        0.01       97.18
       2219 |          8        0.08       97.26
       2911 |          1        0.01       97.27
       3142 |         14        0.14       97.41
       4223 |          2        0.02       97.43
       4413 |          2        0.02       97.45
       4513 |         30        0.30       97.75
       4516 |          4        0.04       97.79
       4523 |         57        0.57       98.36
       4524 |         13        0.13       98.49
       4542 |          1        0.01       98.50
       4823 |          5        0.05       98.55
       4921 |          4        0.04       98.59
       5110 |          2        0.02       98.61
       5421 |          2        0.02       98.63
       5631 |          1        0.01       98.64
       5732 |        104        1.04       99.68
       5733 |          2        0.02       99.70
       7021 |         16        0.16       99.86
       9999 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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