| Period in Effect |
% |
| September 14, 2012 – |
8.25 |
| December 26, 2011 – September 13, 2012 |
8 |
| May 3, 2011 – December 25, 2011 |
8.25 |
| February 28, 2011 – May 2, 2011 |
8 |
| June 1, 2010 –
February 27, 2011 |
7.75 |
| April 30, 2010 – May 31, 2010 |
8 |
| March 29, 2010 – April 29, 2010 |
8.25 |
| February 24, 2010 – March 28, 2010 |
8.5 |
| December 28, 2009 – February 23, 2010 |
8.75 |
| November 25, 2009 – December 27, 2009 |
9 |
| October 30, 2009 – November 24, 2009 |
9.5 |
| September 30, 2009 – October 29, 2009 |
10 |
| September 15, 2009 – September 29, 2009 |
10.5 |
| August 10, 2009 – September 14, 2009 |
10.75 |
| July 13, 2009 – August 9, 2009 |
11 |
| June 5, 2009 – July 12, 2009 |
11.5 |
| May 14, 2009 – June 4, 2009 |
12 |
| April 24, 2009 – May 13, 2009 |
12.5 |
| December 1, 2008 – April 23, 2009 |
13 |
| November 12, 2008 – November 30, 2008 |
12 |
| July 14, 2008 – November 11, 2008 |
11 |
| June 10, 2008 – July
13, 2008 |
10.75 |
| April 29, 2008 – June
9, 2008 |
10.5 |
| February 4, 2008 – April 28, 2008 |
10.25 |
| June 19, 2007 – February
3, 2008 |
10 |
| January 29, 2007 – June 18, 2007 |
10.5 |
| October 23, 2006 – January 28, 2007 |
11 |
|
June 26, 2006 – October 22, 2006 |
11.5 |
| December 26, 2005 – June 25, 2006 |
12 |
| June 15, 2004 – December 25, 2005 |
13 |
| January 15, 2004 – June 14, 2004 |
14 |
| June 21, 2003 – January 14, 2004 |
16 |
| February 17, 2003 – June 20, 2003 |
18 |
| August 7, 2002 – February 16, 2003 |
21 |
| April 9, 2002 – August 6, 2002 |
23 |
| November 4, 2000 – April 8, 2002 |
25 |
| July 10, 2000 – November 3, 2000 |
28 |
| March 21, 2000 – July 9, 2000 |
33 |
| March 7, 2000 – March 20, 2000 |
38 |
| January 24, 2000 – March 6, 2000 |
45 |
| June 10, 1999 – January 23, 2000 |
55 |
| July 24, 1998 – June 9, 1999 |
60 |
| June 29, 1998 – July 23, 1998 |
80 |
| June 5, 1998 – June 28, 1998 |
60 |
| May 27, 1998 – June 4, 1998 |
150 |
| May 19, 1998 – May 26, 1998 |
50 |
| March 16, 1998 – May 18, 1998 |
30 |
| March 2, 1998 – March 15, 1998 |
36 |
| February 17, 1998 – March 1, 1998 |
39 |
| February 2, 1998 – February 16, 1998 |
42 |
| November 11, 1997 – February 1, 1998 |
28 |
| October 6, 1997 – November 10, 1997 |
21 |
| June 16, 1997 – October 5, 1997 |
24 |
| April 28, 1997 – June 15, 1997 |
36 |
| February 10, 1997 – April 27, 1997 |
42 |
| December 2, 1996 – February 9, 1997 |
48 |
| October 21, 1996 – December 1, 1996 |
60 |
| August 19, 1996 – October 20, 1996 |
80 |
| July 24, 1996 – August 18, 1996 |
110 |
| February 10, 1996 – July 23, 1996 |
120 |
| December 1, 1995 – February 9, 1996 |
160 |
| October 24, 1995 – November 30, 1995 |
170 |
| June 19, 1995 – October 23, 1995 |
180 |
| May 16, 1995 – June 18, 1995 |
195 |
| January 6, 1995 – May 15, 1995 |
200 |
| November 17, 1994 – January 5, 1995 |
180 |
| October 12, 1994 – November 16, 1994 |
170 |
| August 23, 1994 – October 11, 1994 |
130 |
| August 1, 1994 – August 22, 1994 |
150 |
| June 30, 1994 – July 31, 1994 |
155 |
| June 22, 1994 – June 29, 1994 |
170 |
| June 2, 1994 – June 21, 1994 |
185 |
| May 17, 1994 – June 1, 1994 |
200 |
| April 29, 1994 – May 16, 1994 |
205 |
| October 15, 1993 – April 28, 1994 |
210 |
| October 15, 1993 – April 28, 1994 |
210 |
| September 23, 1993 – October 14, 1993 |
180 |
| July 15, 1993 – September 22, 1993 |
170 |
| June 29, 1993 – July 14, 1993 |
140 |
| June 22, 1993 – June 28, 1993 |
120 |
| June 2, 1993 – June 21, 1993 |
110 |
| March 30, 1993 – June 1, 1993 |
100 |
| May 23, 1992 – March 29, 1993 |
80 |
| April 10, 1992 – May 22, 1992 |
50 |
| January 1, 1992 – April 9, 1992 |
20 |