Frequencies for voluntarymandated variable in enfrep20130807 dataset :

       Voluntary/Mandated |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
             FDA Mandated |          2        1.46        1.46
Voluntary: Firm Initiated |        135       98.54      100.00
--------------------------+-----------------------------------
                    Total |        137      100.00

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