Frequencies for first 10,000 rows of rx2cat3 variable in nhamcsopd2008 dataset :

   for rx2, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,913       99.13       99.13
        185 |          7        0.07       99.20
        197 |         33        0.33       99.53
        203 |         38        0.38       99.91
        265 |          1        0.01       99.92
        270 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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