Year	Years
1963	5.34
1964	4.742
1965	4.086
1966	3.113
1967	1.938
1968	1.8
1969	1.865
1970	2.654
1971	2.464
1972	3.156
1973	2.589
1974	1.872
1975	1.201
1976	1.063
1977	1.049
1978	1.002
1979	0.2553
1980	-1.664
1981	-1.772
1982	-2.619
1983	-2.133
1984	-2.059
1985	-2.049
1986	-1.827
1987	-0.7452
1988	-0.5257
1989	0.5284
1990	1.774
1991	1.624
1992	2.049
1993	1.943
1994	2.184
1995	2.608
1996	2.451
1997	1.407
1998	1.545
1999	0.6794
2000	0.168
2001	0.3582
2002	0.00705
2003	-0.3392