Frequencies for year variable in daphrr2001_2005 dataset :

   Year ( ( |
2005 + 2001 |
    ) / 2 ) |      Freq.     Percent        Cum.
------------+-----------------------------------
       2003 |        307      100.00      100.00
------------+-----------------------------------
      Total |        307      100.00

by Jean Roth , jroth@nber.org , 14 Mar 2018