Frequencies for first 10,000 rows of scopewi1 variable in namcs2005 dataset :

      scope |
  procedure |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,843       98.43       98.43
       1811 |          1        0.01       98.44
       2121 |          2        0.02       98.46
       2219 |          1        0.01       98.47
       3142 |          6        0.06       98.53
       4413 |          4        0.04       98.57
       4513 |         14        0.14       98.71
       4523 |         97        0.97       99.68
       4524 |          2        0.02       99.70
       4823 |          3        0.03       99.73
       4921 |          4        0.04       99.77
       5421 |          2        0.02       99.79
       5732 |          2        0.02       99.81
       7021 |          1        0.01       99.82
       8021 |          1        0.01       99.83
       8026 |          3        0.03       99.86
       9999 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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