ZZ Series - December 2010
YY Series - December 2009
XX Series - December 2008
WW Series - December 2007
VV Series - December 2006
UU Series - February 2006
TT Series - August 2005
SS Series - December 2004
RR Series - August 2004
QQ Series - December 2003
PP Series - August 2003
OO Series - April 2003
NN Series - February 2003
MM Series - October 2002
LL Series - June 2002
KK Series - February 2002
JJ Series - December 2001
II Series - October 2001
HH Series - June 2001
GG Series - April 2001
FF Series - February 2001
EE Series - December 2000
DD Series - October 2000
CC Series - June 2000
BB Series - April 2000
AA Series - December 1999

Z Series - June 1999
Y Series - February 1999
X Series - December 1998
W Series - June 1998
V Series - February 1998
U Series - October 1997
T Series - June 1997
S Series - April 1997
R Series - December 1996
Q Series - June 1996
P Series - April 1996
O Series - February 1996
N Series - December 1995
M Series - August 1995
L Series - April 1995
K Series - October 1994
J Series - June 1994
I Series - May 1994
H Series - June 1993
G Series - March 1993
F Series - January 1993
E Series - September 1992
D Series - July 1992
C Series - June 1992
B Series - 1991
A Series - 1991