Frequencies for first 10,000 rows of drg1ing3 variable in nhamcsed1993 dataset :

 ingredient |
code #3 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,849       98.49       98.49
      50410 |          1        0.01       98.50
      50637 |          1        0.01       98.51
      50745 |         22        0.22       98.73
      51443 |          1        0.01       98.74
      52908 |          1        0.01       98.75
      52955 |          1        0.01       98.76
      53175 |         14        0.14       98.90
      53325 |          1        0.01       98.91
      53895 |          4        0.04       98.95
      54050 |          1        0.01       98.96
      54350 |          4        0.04       99.00
      54395 |         29        0.29       99.29
      54465 |         22        0.22       99.51
      54595 |         19        0.19       99.70
      54995 |          2        0.02       99.72
      55240 |         26        0.26       99.98
      55745 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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