cost year
8.4 1995
8.36 1996
8.43 1997
8.26 1998
8.16 1999
8.24 2000
8.58 2001
8.44 2002
8.72 2003
8.95 2004
9.45 2005
10.4 2006
10.65 2007
11.36 2008