Year	Percent change
1980	-43.979
1981	10.362
1982	-15.937
1983	19.713
1984	-13.532
1985	-22.934
1986	-16.847
1987	7.668
1988	-17.743
1989	24.244
1990	13.129
1991	-11.121
1992	-23.139
1993	22.832
1994	-23.1
1995	26.913
1996	9.651
1997	17.695
1998	0.815
1999	10.529
2000	17.266
2001	5.104
2002	-6.386
2003	5.174
2004	19.53
2005	4.477
2006	74.561
2007	10.709
2008	2.084
2009	2.353
2010	17.369
2011	6.152
2012	13.92
2013	4.528
2014	6.391
2015	-5.281
2016	1.809
2017	6.031
2018	-0.719
2019	-8.082
2020	3.279
2021	3.661
2022	3.08
2023	3.382
2024	3.935