Frequencies for first 10,000 rows of scpwi12d variable in namcs2006 dataset :

      scope |
  procedure |
     #1 - 2 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,842       98.42       98.42
         16 |          1        0.01       98.43
         34 |          1        0.01       98.44
         42 |          1        0.01       98.45
         44 |          5        0.05       98.50
         45 |        117        1.17       99.67
         48 |          7        0.07       99.74
         49 |          1        0.01       99.75
         51 |          4        0.04       99.79
         54 |          6        0.06       99.85
         57 |          6        0.06       99.91
         70 |          1        0.01       99.92
         99 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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