Frequencies for first 10,000 rows of proc42d variable in namcs2012 dataset :

Procedure 4 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,955       99.55       99.55
         38 |          1        0.01       99.56
         39 |          1        0.01       99.57
         44 |          1        0.01       99.58
         57 |          2        0.02       99.60
         74 |          1        0.01       99.61
         83 |          1        0.01       99.62
         85 |          1        0.01       99.63
         86 |          2        0.02       99.65
         88 |          1        0.01       99.66
         89 |         11        0.11       99.77
         90 |          3        0.03       99.80
         91 |          5        0.05       99.85
         94 |          1        0.01       99.86
         95 |          1        0.01       99.87
         96 |          1        0.01       99.88
         99 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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