Frequencies for first 10,000 rows of dur_cod variable in ther2006q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,012       70.12       70.12
        DAY |      2,073       20.73       90.85
         HR |         20        0.20       91.05
        MIN |        218        2.18       93.23
        MON |        368        3.68       96.91
         WK |        148        1.48       98.39
         YR |        161        1.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015