Frequencies for age_ref_ variable in fmli132 dataset :

   age_ref_ |      Freq.     Percent        Cum.
------------+-----------------------------------
          D |      6,486       95.92       95.92
          T |        276        4.08      100.00
------------+-----------------------------------
      Total |      6,762      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016