1 (1997/9/30-12/31)
2 (1998/1/1-3/31) 3
(4/2-6/28) 4 (7/1-9/30) 5
(10/1-12/28)
6 (1999/1/1-3/31)
7 (4/1-6/30) 8
(7/5-9/30) 9 (10/2-12/31)
10
(2000/1/5-3/22) 11 (4/1-6-29) 12
(7/11-12/21)
13 (2001/1/1-6/14)
14 (7/5-12/28)
15
(2002/1/1-6/30) 16 (7/1-12/23)
17 (2003/1/6-6/28) 18
(7/1-12/28)
19 (2004/1/9-6/24)
20 (7/8-12/30)
21 (2005/1/7-12/15)
22 (2006/1/10-6/29) 23 (7/19-12/19)
24 (2007/1/17-12/26)
25(Current) (2008/1/15-)