Frequencies for year variable in icd2ccrxhcc3xw2013 dataset :

       Year |      Freq.     Percent        Cum.
------------+-----------------------------------
       2013 |      1,472      100.00      100.00
------------+-----------------------------------
      Total |      1,472      100.00

by Jean Roth , jroth@nber.org , 12 Jan 2016