Frequencies for first 10,000 rows of prescr7 variable in namcs2005 dataset :

prescriptio |
   n status |
   code for |
     med #7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        625        6.25        6.25
          2 |         94        0.94        7.19
          3 |         54        0.54        7.73
          . |      9,227       92.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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