Frequencies for first 10,000 rows of rx2v1c2 variable in namcs2007 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,501       95.01       95.01
        001 |         43        0.43       95.44
        040 |         25        0.25       95.69
        057 |        107        1.07       96.76
        081 |         90        0.90       97.66
        087 |          2        0.02       97.68
        097 |         46        0.46       98.14
        105 |         74        0.74       98.88
        115 |         11        0.11       98.99
        122 |         49        0.49       99.48
        133 |         14        0.14       99.62
        242 |          4        0.04       99.66
        254 |          1        0.01       99.67
        331 |          1        0.01       99.68
        358 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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