Frequencies for first 10,000 rows of dur_cod variable in ther2005q1 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,697       76.97       76.97
        DAY |      1,643       16.43       93.40
         HR |         24        0.24       93.64
        MIN |        187        1.87       95.51
        MON |        135        1.35       96.86
        SEC |          2        0.02       96.88
         WK |        100        1.00       97.88
         YR |        212        2.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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