Average Books
Summer 2002 |
Winter 2002 - 2003 |
Summer 2003 |
Winter 2003 - 2004 |
Summer 2004 |
Winter 2004 - 2005 |
Summer 2005 |
Winter 2005 - 2006 |
Summer 2006 |
Winter 2006 - 2007 |
Summer 2007 |
Winter 2007 - 2008 |
Summer 2008 |
Winter 2008 - 2009 |
Summer 2009 |
Winter 2009 - 2010 |
Summer 2010 |
Winter 2010 - 2011 |
Summer 2011 |
Winter 2011 - 2012 |
Summer 2012 |
Winter 2012 - 2013 |
Summer 2013 |
Winter 2013 - 2014 |