Frequencies for first 10,000 rows of drug1cl3 variable in namcs2003 dataset :

ndc code #3 |
        for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,835       98.35       98.35
       0510 |          1        0.01       98.36
       0514 |         15        0.15       98.51
       0915 |          1        0.01       98.52
       1275 |          2        0.02       98.54
       1374 |         13        0.13       98.67
       1568 |          6        0.06       98.73
       1670 |         21        0.21       98.94
       1728 |         82        0.82       99.76
       1864 |          1        0.01       99.77
       1943 |          3        0.03       99.80
       1944 |         14        0.14       99.94
       1945 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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