Year	Percent
1970	1.10671
1971	1.11999
1972	1.13277
1973	1.1618
1974	1.1863
1975	1.20769
1976	1.22024
1977	1.22752
1978	1.22367
1979	1.22366
1980	1.20526
1981	1.18566
1983	1.15182
1984	1.12761
1985	1.11038
1986	1.08346
1987	1.07184
1988	1.06984
1989	1.07051
1990	1.0803
1991	1.08751
1992	1.07522
1993	1.05799
1994	1.04193
1995	1.03534
1998	1.02371
1999	1.02178
2000	1.02029
2001	1.01376
2002	1.01161
2003	1.01126
2004	1.00343
2005	0.99985
2006	1.00346
2007	1.00007
2008	1.01048