Year	Percent change
1980	11.073
1981	8.404
1982	-16.461
1983	-5.846
1984	10.944
1985	1.832
1986	16.848
1987	5.94
1988	-2.125
1989	1.938
1990	-3.465
1991	4.124
1992	10.02
1993	-2.597
1994	7.387
1995	3.003
1996	4.082
1997	23.103
1998	4.514
1999	24.444
2000	22.184
2001	0.119
2002	-7.323
2003	-0.736
2004	18.552
2005	3.34
2006	5.212
2007	10.618
2008	3.473
2009	-18.52
2010	4.861
2011	0.026
2012	1.173
2013	1.512
2014	7.749
2015	3.09
2016	-1.82
2017	6.76
2018	8.133
2019	5.681
2020	5.416
2021	4.293
2022	3.252
2023	2.324
2024	1.464