Frequencies for first 10,000 rows of proc4r variable in namcs2012 dataset :

    Numeric |
 version of |
   write-in |
  procedure |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,955       99.55       99.55
       3808 |          1        0.01       99.56
       3950 |          1        0.01       99.57
       4401 |          1        0.01       99.58
       5732 |          1        0.01       99.59
       5733 |          1        0.01       99.60
       7499 |          1        0.01       99.61
       8313 |          1        0.01       99.62
       8520 |          1        0.01       99.63
       8619 |          2        0.02       99.65
       8849 |          1        0.01       99.66
       8908 |         11        0.11       99.77
       9059 |          3        0.03       99.80
       9132 |          3        0.03       99.83
       9139 |          1        0.01       99.84
       9169 |          1        0.01       99.85
       9446 |          1        0.01       99.86
       9509 |          1        0.01       99.87
       9625 |          1        0.01       99.88
       9923 |          1        0.01       99.89
       9925 |          1        0.01       99.90
       9929 |          1        0.01       99.91
       9948 |          1        0.01       99.92
       9952 |          3        0.03       99.95
       9955 |          3        0.03       99.98
       9959 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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