Year	Years
1964	0.8286
1965	1.397
1966	1.889
1967	1.873
1968	1.36
1969	1.529
1970	0.2878
1971	1.162
1972	1.895
1973	2.586
1974	2.891
1975	2.196
1976	1.829
1977	1.728
1978	2.622
1979	3.057
1980	4.15
1981	3.13
1982	2.2
1983	2.1
1984	1.626
1985	1.939
1986	1.601
1987	1.027
1988	0.2461
1989	-0.363
1990	-0.3586
1991	-0.2159
1992	-1.474
1993	-0.6398
1994	1.365
1995	1.104
1996	0.9051
1997	1.534
1998	1.969
1999	1.971
2000	2.089
2001	0.9819
2002	2.213
2003	1.424
2004	-0.1934