Frequencies for first 10,000 rows of rx7v1c1 variable in namcs2009 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,745       87.45       87.45
        001 |         42        0.42       87.87
        020 |         11        0.11       87.98
        028 |          2        0.02       88.00
        040 |        231        2.31       90.31
        057 |        245        2.45       92.76
        081 |         29        0.29       93.05
        087 |         78        0.78       93.83
        097 |         52        0.52       94.35
        105 |         30        0.30       94.65
        113 |         17        0.17       94.82
        115 |        116        1.16       95.98
        122 |         89        0.89       96.87
        133 |         50        0.50       97.37
        218 |         25        0.25       97.62
        242 |         53        0.53       98.15
        254 |         14        0.14       98.29
        358 |        170        1.70       99.99
        899 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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