Frequencies for first 10,000 rows of dur_cod variable in ther2004q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,583       95.83       95.83
        DAY |        263        2.63       98.46
         HR |         14        0.14       98.60
        MIN |          4        0.04       98.64
        MON |         43        0.43       99.07
         WK |         46        0.46       99.53
         YR |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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