Year	Percent change
1980	-10.661
1981	14.805
1982	2.707
1983	6.451
1984	17.286
1985	5.971
1986	-8.582
1987	1.509
1988	14.061
1989	-3.567
1990	21.049
1991	1.605
1992	-6.634
1993	1.411
1994	3.574
1995	-0.964
1996	-1.942
1997	5.508
1998	1.228
1999	10.145
2000	4.529
2001	6.27
2002	9.704
2003	-9.954
2004	12.945
2005	0.839
2006	-13.404
2007	22.189
2008	21.543
2009	-19.533
2010	38.184
2011	9.51
2012	20.762
2013	16.281
2014	11.864
2015	7.702
2016	7.99
2017	11.703
2018	13.244
2019	5.576
2020	6.983
2021	2.891
2022	7.368
2023	8.149
2024	5.796