Frequencies for first 10,000 rows of rx4v1c1 variable in namcs2009 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,026       70.26       70.26
        001 |        104        1.04       71.30
        020 |         13        0.13       71.43
        028 |          3        0.03       71.46
        040 |        588        5.88       77.34
        057 |        570        5.70       83.04
        081 |         51        0.51       83.55
        087 |        202        2.02       85.57
        097 |        156        1.56       87.13
        105 |         40        0.40       87.53
        113 |         27        0.27       87.80
        115 |        185        1.85       89.65
        122 |        212        2.12       91.77
        133 |        113        1.13       92.90
        218 |         49        0.49       93.39
        242 |        134        1.34       94.73
        254 |        111        1.11       95.84
        331 |          4        0.04       95.88
        358 |        408        4.08       99.96
        365 |          2        0.02       99.98
        899 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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