Year	Percent change
1980	-17.608
1981	19.373
1982	-33.568
1983	2.695
1984	9.97
1985	-13.892
1986	-6.124
1987	-8.673
1988	16.102
1989	2.256
1990	-21.55
1991	-12.831
1992	-14.185
1993	136.365
1994	8.878
1995	9.324
1996	6.031
1997	23.358
1998	10.668
1999	5.13
2000	16.945
2001	-5.69
2002	1.941
2003	8.662
2004	7.979
2005	1.155
2006	-0.004
2007	9.224
2008	-15.435
2009	-27.454
2010	103.103
2011	11.824
2012	4.634
2013	11.806
2014	9.152
2015	0.451
2016	5.58
2017	2.583
2018	6.828
2019	1.896
2020	4.814
2021	4.511
2022	4.597
2023	4.767
2024	5.062