Frequencies for first 10,000 rows of scpwi12d variable in namcs2001 dataset :

      scope |
  procedure |
write-in #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,712       97.12       97.12
         12 |          4        0.04       97.16
         18 |          1        0.01       97.17
         21 |          1        0.01       97.18
         22 |          8        0.08       97.26
         29 |          1        0.01       97.27
         31 |         14        0.14       97.41
         42 |          2        0.02       97.43
         44 |          2        0.02       97.45
         45 |        105        1.05       98.50
         48 |          5        0.05       98.55
         49 |          4        0.04       98.59
         51 |          2        0.02       98.61
         54 |          2        0.02       98.63
         56 |          1        0.01       98.64
         57 |        106        1.06       99.70
         70 |         16        0.16       99.86
         99 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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