Frequencies for first 10,000 rows of proc43d variable in namcs1994 dataset :

 service #4 |
  procedure |
   code - 3 |
     digits |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,932       99.32       99.32
        295 |          1        0.01       99.33
        452 |          2        0.02       99.35
        753 |          1        0.01       99.36
        870 |          1        0.01       99.37
        873 |          5        0.05       99.42
        874 |          1        0.01       99.43
        876 |          5        0.05       99.48
        877 |          1        0.01       99.49
        882 |          1        0.01       99.50
        887 |          8        0.08       99.58
        889 |          4        0.04       99.62
        891 |          2        0.02       99.64
        893 |          5        0.05       99.69
        894 |          1        0.01       99.70
        895 |          1        0.01       99.71
        909 |          2        0.02       99.73
        914 |          5        0.05       99.78
        919 |          1        0.01       99.79
        920 |          1        0.01       99.80
        921 |          1        0.01       99.81
        930 |          1        0.01       99.82
        931 |          1        0.01       99.83
        932 |          1        0.01       99.84
        935 |          2        0.02       99.86
        936 |          1        0.01       99.87
        950 |          1        0.01       99.88
        951 |          2        0.02       99.90
        953 |          6        0.06       99.96
        965 |          2        0.02       99.98
        999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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