Frequencies for first 10,000 rows of proc12d variable in namcs2009 dataset :

procedure 1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      7,261       72.61       72.61
         00 |          1        0.01       72.62
         03 |         10        0.10       72.72
         04 |          3        0.03       72.75
         05 |          1        0.01       72.76
         06 |          2        0.02       72.78
         08 |          1        0.01       72.79
         13 |          1        0.01       72.80
         18 |          1        0.01       72.81
         20 |          1        0.01       72.82
         24 |          1        0.01       72.83
         27 |          1        0.01       72.84
         33 |          1        0.01       72.85
         37 |          1        0.01       72.86
         38 |          4        0.04       72.90
         39 |          3        0.03       72.93
         40 |          1        0.01       72.94
         44 |          2        0.02       72.96
         45 |        139        1.39       74.35
         48 |          2        0.02       74.37
         53 |          1        0.01       74.38
         54 |          2        0.02       74.40
         55 |          3        0.03       74.43
         57 |          2        0.02       74.45
         64 |          1        0.01       74.46
         67 |          1        0.01       74.47
         68 |          6        0.06       74.53
         69 |         19        0.19       74.72
         70 |          5        0.05       74.77
         71 |          1        0.01       74.78
         75 |          5        0.05       74.83
         77 |          1        0.01       74.84
         78 |          3        0.03       74.87
         80 |          3        0.03       74.90
         81 |         17        0.17       75.07
         82 |          1        0.01       75.08
         83 |          7        0.07       75.15
         84 |          1        0.01       75.16
         85 |          1        0.01       75.17
         86 |        118        1.18       76.35
         87 |          7        0.07       76.42
         88 |         26        0.26       76.68
         89 |      1,538       15.38       92.06
         90 |        163        1.63       93.69
         91 |         79        0.79       94.48
         92 |          3        0.03       94.51
         93 |        180        1.80       96.31
         94 |         16        0.16       96.47
         95 |         82        0.82       97.29
         96 |         26        0.26       97.55
         97 |         31        0.31       97.86
         98 |          5        0.05       97.91
         99 |        209        2.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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