Year	Percent change
1980	-9
1981	11.2
1982	0.3
1983	13.3
1984	15.5
1985	6.1
1986	8.1
1987	20.9
1988	16.7
1989	13.33
1990	12.517
1991	20.126
1992	3.751
1993	7.717
1994	21.672
1995	21.165
1996	14.323
1997	1.576
1998	-26.788
1999	29.787
2000	22.618
2001	-4.575
2002	15.109
2003	11.728
2004	11.035
2005	6.891
2006	12.466
2007	10.555
2008	3.009
2009	-7.052
2010	19.105
2011	17.569
2012	1.905
2013	1.318
2014	0.527
2015	0.716
2016	3.325
2017	7.424
2018	1.894
2019	3.044
2020	2.945
2021	4.034
2022	3.992
2023	3.96
2024	3.995