Frequencies for first 10,000 rows of drugid23 variable in nhamcsed2015 dataset 

    Drug ID |
   code for |
 medication |
        #23 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,980       99.80       99.80
     a53175 |          1        0.01       99.81
     d00044 |          1        0.01       99.82
     d00241 |          1        0.01       99.83
     d00269 |          1        0.01       99.84
     d00308 |          1        0.01       99.85
     d00328 |          1        0.01       99.86
     d00395 |          1        0.01       99.87
     d00438 |          1        0.01       99.88
     d00746 |          1        0.01       99.89
     d00867 |          1        0.01       99.90
     d00910 |          1        0.01       99.91
     d01013 |          3        0.03       99.94
     d01456 |          1        0.01       99.95
     d02376 |          1        0.01       99.96
     d03050 |          1        0.01       99.97
     d03428 |          1        0.01       99.98
     d04294 |          1        0.01       99.99
     d04783 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017