Frequencies for first 10,000 rows of drg3ing3 variable in namcs2000 dataset :

 ingredient |
code #3 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,926       99.26       99.26
      50637 |          1        0.01       99.27
      50745 |          1        0.01       99.28
      53175 |          1        0.01       99.29
      53780 |          1        0.01       99.30
      54328 |          7        0.07       99.37
      54395 |          1        0.01       99.38
      54455 |          4        0.04       99.42
      54465 |          8        0.08       99.50
      54468 |          5        0.05       99.55
      54860 |          1        0.01       99.56
      54960 |          3        0.03       99.59
      54990 |          1        0.01       99.60
      54995 |          3        0.03       99.63
      55130 |         19        0.19       99.82
      55240 |          1        0.01       99.83
      55755 |          1        0.01       99.84
      56445 |          3        0.03       99.87
      59803 |         10        0.10       99.97
      70011 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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