Year	US Dollars adjusted for inflation)
1991	12.22
1992	12.11
1993	12.14
1994	11.38
1995	11.05
1996	10.68
1997	10.93
1998	11.22
1999	10.93
2000	10.73
2001	10.23
2002	10.46
2003	10.59
2004	10.89
2005	11.09