Frequencies for first 10,000 rows of drug1cl3 variable in namcs2005 dataset :

ndc code #3 |
        for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,799       97.99       97.99
       0506 |          1        0.01       98.00
       0510 |          1        0.01       98.01
       0514 |         27        0.27       98.28
       1268 |          1        0.01       98.29
       1275 |          1        0.01       98.30
       1374 |         20        0.20       98.50
       1568 |          6        0.06       98.56
       1670 |          9        0.09       98.65
       1727 |          1        0.01       98.66
       1728 |         72        0.72       99.38
       1864 |          3        0.03       99.41
       1943 |          2        0.02       99.43
       1944 |         48        0.48       99.91
       1945 |          4        0.04       99.95
       2095 |          2        0.02       99.97
       2096 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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