Wintersemester 1998/1999 Sommersemester 1999 Wintersemester 1999/2000 Sommersemester 2000 Wintersemester 2000/2001 Sommersemester 2001 Sommersemester 2003 Sommersemester 2004 Wintersemester 2007/2008 Sommersemester 2008 Wintersemester 2008/2009