Year	Years
1965	4.192
1966	4.965
1967	5.044
1968	5.607
1969	5.769
1970	5.895
1971	7.42
1972	7.739
1973	8.425
1974	7.506
1975	5.823
1976	7.082
1977	4.858
1978	3.383
1979	2.288
1980	-0.6463
1981	-3.564
1982	-3.947
1983	-4.375
1984	-3.425
1985	-3.01
1986	-5.733
1987	-4.806
1988	-4.723
1989	-4.509
1990	-2.043
1991	0.1444
1992	0.5698
1993	0.3109
1994	0.5358
1995	0.09947
1996	1.603
1997	2.38
1998	3.404
1999	3.852
2000	3.182
2001	2.673
2002	2.312
2003	2.21