Frequencies for first 10,000 rows of dur_cod variable in ther2014q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,988       99.88       99.88
        DAY |          3        0.03       99.91
        TOT |          2        0.02       99.93
         WK |          2        0.02       99.95
         YR |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Apr 2017