Year	Percent change
1980	13.355
1981	10.338
1982	7.437
1983	4.566
1984	0.094
1985	7.484
1986	3.415
1987	2.058
1988	10.737
1989	1.901
1990	5.637
1991	-18.192
1992	26.22
1993	0.819
1994	27.351
1995	17.507
1996	6.857
1997	13.876
1998	4.603
1999	6.551
2000	2.189
2001	-0.893
2002	12.442
2003	8.524
2004	35.838
2005	16.656
2006	11.519
2007	18.802
2008	2.959
2009	4.627
2010	15.77
2011	10.636
2012	1.824
2013	-3.378
2014	5.446
2015	-0.205
2016	4.027
2017	13.803
2018	9.582
2019	9.949
2020	8.728
2021	8.73
2022	8.634
2023	8.904
2024	8.908