Frequencies for first 10,000 rows of dur_cod variable in ther2011q1 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,364       73.64       73.64
        DAY |      2,302       23.02       96.66
         HR |          2        0.02       96.68
        MIN |         14        0.14       96.82
        MON |         74        0.74       97.56
         WK |        158        1.58       99.14
         YR |         86        0.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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