Frequencies for first 10,000 rows of proc12d variable in namcs2010 dataset :

procedure 1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      7,139       71.39       71.39
         04 |          1        0.01       71.40
         06 |          3        0.03       71.43
         10 |          1        0.01       71.44
         13 |          3        0.03       71.47
         17 |          1        0.01       71.48
         18 |          6        0.06       71.54
         21 |          3        0.03       71.57
         22 |          5        0.05       71.62
         23 |         21        0.21       71.83
         25 |          2        0.02       71.85
         32 |          1        0.01       71.86
         37 |          3        0.03       71.89
         38 |          5        0.05       71.94
         39 |          3        0.03       71.97
         41 |          2        0.02       71.99
         44 |         10        0.10       72.09
         45 |         97        0.97       73.06
         48 |          3        0.03       73.09
         49 |          2        0.02       73.11
         51 |          3        0.03       73.14
         52 |          1        0.01       73.15
         53 |         10        0.10       73.25
         54 |          4        0.04       73.29
         58 |          1        0.01       73.30
         60 |          1        0.01       73.31
         64 |          4        0.04       73.35
         65 |          1        0.01       73.36
         66 |          2        0.02       73.38
         67 |          5        0.05       73.43
         68 |          4        0.04       73.47
         69 |          5        0.05       73.52
         70 |          3        0.03       73.55
         71 |          1        0.01       73.56
         75 |          3        0.03       73.59
         79 |          1        0.01       73.60
         80 |          4        0.04       73.64
         81 |         28        0.28       73.92
         83 |          3        0.03       73.95
         85 |         18        0.18       74.13
         86 |        125        1.25       75.38
         87 |          8        0.08       75.46
         88 |         20        0.20       75.66
         89 |      1,574       15.74       91.40
         90 |        203        2.03       93.43
         91 |        145        1.45       94.88
         92 |          2        0.02       94.90
         93 |         92        0.92       95.82
         94 |          8        0.08       95.90
         95 |        133        1.33       97.23
         96 |         25        0.25       97.48
         97 |         28        0.28       97.76
         98 |          6        0.06       97.82
         99 |        218        2.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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