Frequencies for first 10,000 rows of scpwi12d variable in namcs2003 dataset :

      scope |
  procedure |
write-in #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,669       96.69       96.69
         18 |          1        0.01       96.70
         21 |          7        0.07       96.77
         22 |         26        0.26       97.03
         29 |          3        0.03       97.06
         31 |         38        0.38       97.44
         33 |          2        0.02       97.46
         42 |          2        0.02       97.48
         44 |          8        0.08       97.56
         45 |        152        1.52       99.08
         48 |          2        0.02       99.10
         49 |          1        0.01       99.11
         51 |          1        0.01       99.12
         52 |          1        0.01       99.13
         54 |          5        0.05       99.18
         56 |          2        0.02       99.20
         57 |         51        0.51       99.71
         68 |          7        0.07       99.78
         70 |         10        0.10       99.88
         80 |          3        0.03       99.91
         89 |          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