Year	Percent change
1980	-3.447
1981	4.284
1982	-3.257
1983	33.254
1984	0.976
1985	11.414
1986	-12.517
1987	-6.216
1988	30.154
1989	6.34
1990	4.201
1991	-6.745
1992	10.693
1993	41.795
1994	-13.193
1995	5.276
1996	18.556
1997	22.201
1998	30.405
1999	-2.723
2000	-23.74
2001	45.446
2002	-11.769
2003	-9.991
2004	8.088
2005	24.966
2006	1.304
2007	-12.343
2008	6.201
2009	-0.119
2010	-5.833
2011	4.429
2012	5.74
2013	8.404
2014	8.003
2015	-1.412
2016	14.394
2017	10.902
2018	-4.163
2019	5.995
2020	5.106
2021	6.258
2022	1.788
2023	4.471
2024	3.228