Year	Percent change
1980	-3.497
1981	5.797
1982	8.15
1983	7.093
1984	8.397
1985	5.619
1986	3.357
1987	2.549
1988	5.1
1989	7.8
1990	5.047
1991	5.809
1992	8.7
1993	8.078
1994	8.834
1995	9.54
1996	9.34
1997	8.152
1998	5.765
1999	4.774
2000	6.787
2001	6.895
2002	7.08
2003	7.341
2004	7.789
2005	7.547
2006	6.978
2007	7.129
2008	5.662
2009	5.398
2010	6.423
2011	6.24
2012	5.247
2013	5.422
2014	5.984
2015	6.679
2016	6.211
2017	6.812
2018	7.076
2019	6.5
2020	6.5
2021	6.5
2022	6.5
2023	6.5
2024	6.5