Frequencies for first 10,000 rows of proc12d variable in namcs2012 dataset :

Procedure 1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      6,762       67.62       67.62
         00 |          2        0.02       67.64
         03 |         17        0.17       67.81
         04 |          6        0.06       67.87
         08 |          1        0.01       67.88
         09 |          1        0.01       67.89
         13 |          5        0.05       67.94
         14 |          7        0.07       68.01
         16 |          4        0.04       68.05
         17 |          1        0.01       68.06
         18 |         12        0.12       68.18
         20 |          1        0.01       68.19
         21 |          6        0.06       68.25
         22 |         21        0.21       68.46
         23 |          1        0.01       68.47
         28 |          2        0.02       68.49
         31 |          6        0.06       68.55
         33 |          1        0.01       68.56
         34 |          1        0.01       68.57
         37 |          1        0.01       68.58
         38 |          4        0.04       68.62
         39 |         13        0.13       68.75
         40 |          1        0.01       68.76
         42 |          5        0.05       68.81
         43 |          1        0.01       68.82
         44 |         13        0.13       68.95
         45 |         36        0.36       69.31
         46 |          1        0.01       69.32
         48 |          8        0.08       69.40
         49 |         19        0.19       69.59
         51 |          4        0.04       69.63
         52 |          2        0.02       69.65
         53 |         10        0.10       69.75
         54 |          3        0.03       69.78
         55 |          2        0.02       69.80
         56 |          2        0.02       69.82
         57 |         29        0.29       70.11
         58 |          2        0.02       70.13
         63 |          4        0.04       70.17
         64 |          1        0.01       70.18
         65 |          1        0.01       70.19
         68 |          3        0.03       70.22
         69 |          5        0.05       70.27
         70 |          6        0.06       70.33
         75 |          6        0.06       70.39
         79 |          2        0.02       70.41
         80 |          2        0.02       70.43
         81 |         27        0.27       70.70
         82 |          1        0.01       70.71
         83 |         32        0.32       71.03
         85 |         18        0.18       71.21
         86 |        176        1.76       72.97
         87 |         18        0.18       73.15
         88 |         55        0.55       73.70
         89 |        918        9.18       82.88
         90 |        749        7.49       90.37
         91 |        120        1.20       91.57
         92 |         18        0.18       91.75
         93 |         38        0.38       92.13
         94 |         27        0.27       92.40
         95 |        311        3.11       95.51
         96 |         25        0.25       95.76
         97 |         30        0.30       96.06
         98 |          1        0.01       96.07
         99 |        393        3.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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