LewisYKT-1991
FomonYKT-1992
CottleYKT-1993
Converse YKT-1994
Converse YKT-1995
FreerYKT-1996
Joseph YKT-1997
Cottle-NeivertYKT-1998
CottleYKT-1999
BeckmannYKT-2004
Kressner YKT-2000
Cottle-WalshamYKT-2001