Frequencies for first 10,000 rows of proc43d variable in namcs2012 dataset :

Procedure 4 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,955       99.55       99.55
        380 |          1        0.01       99.56
        395 |          1        0.01       99.57
        440 |          1        0.01       99.58
        573 |          2        0.02       99.60
        749 |          1        0.01       99.61
        831 |          1        0.01       99.62
        852 |          1        0.01       99.63
        861 |          2        0.02       99.65
        884 |          1        0.01       99.66
        890 |         11        0.11       99.77
        905 |          3        0.03       99.80
        913 |          4        0.04       99.84
        916 |          1        0.01       99.85
        944 |          1        0.01       99.86
        950 |          1        0.01       99.87
        962 |          1        0.01       99.88
        992 |          3        0.03       99.91
        994 |          1        0.01       99.92
        995 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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