Frequencies for first 10,000 rows of med12 variable in nhamcsed2012 dataset :

 Medication |
         12 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,986       99.86       99.86
      02209 |          1        0.01       99.87
      03318 |          1        0.01       99.88
      09175 |          1        0.01       99.89
      09213 |          1        0.01       99.90
      09614 |          1        0.01       99.91
      25638 |          1        0.01       99.92
      42800 |          1        0.01       99.93
      60800 |          1        0.01       99.94
      91039 |          1        0.01       99.95
      93224 |          1        0.01       99.96
      93237 |          1        0.01       99.97
      93305 |          1        0.01       99.98
      94004 |          1        0.01       99.99
      99033 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016