Frequencies for first 10,000 rows of proc53d variable in nhamcsopd1994 dataset :

 service #5 |
  procedure |
   code - 3 |
     digits |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,977       99.77       99.77
        162 |          1        0.01       99.78
        451 |          1        0.01       99.79
        579 |          1        0.01       99.80
        870 |          1        0.01       99.81
        882 |          1        0.01       99.82
        883 |          1        0.01       99.83
        887 |          1        0.01       99.84
        890 |          2        0.02       99.86
        892 |          1        0.01       99.87
        893 |          2        0.02       99.89
        895 |          3        0.03       99.92
        914 |          3        0.03       99.95
        919 |          1        0.01       99.96
        943 |          1        0.01       99.97
        952 |          1        0.01       99.98
        999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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