Year	Percent change
1980	11.572
1981	-8.194
1982	8.08
1983	7.196
1984	16.277
1985	-7.078
1986	-16.085
1987	-14.016
1988	4.412
1989	12.884
1990	4.042
1991	16.467
1992	-8.49
1993	0.909
1994	9.339
1995	2.433
1996	7.815
1997	6.612
1998	5.232
1999	4.814
2000	7.177
2001	-2.217
2002	-1.814
2003	10.096
2004	3.127
2005	19.83
2006	4.608
2007	8.408
2008	-3.63
2009	-14.614
2010	5.159
2011	-6.279
2012	-7.355
2013	3.043
2014	-2.931
2015	6.345
2016	12.296
2017	0.626
2018	0.292
2019	1.812
2020	2.911
2021	2.256
2022	2.346
2023	2.501
2024	2.932