Frequencies for first 10,000 rows of scpwi12d variable in namcs2004 dataset :

      scope |
  procedure |
write-in #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,668       96.68       96.68
         12 |          4        0.04       96.72
         16 |         22        0.22       96.94
         18 |          2        0.02       96.96
         21 |         12        0.12       97.08
         22 |         24        0.24       97.32
         29 |          1        0.01       97.33
         31 |         24        0.24       97.57
         33 |          1        0.01       97.58
         34 |          1        0.01       97.59
         42 |          2        0.02       97.61
         45 |        105        1.05       98.66
         48 |          1        0.01       98.67
         49 |          1        0.01       98.68
         51 |          2        0.02       98.70
         54 |          5        0.05       98.75
         56 |          1        0.01       98.76
         57 |         96        0.96       99.72
         68 |          3        0.03       99.75
         70 |         12        0.12       99.87
         80 |          7        0.07       99.94
         99 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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