Year	Percent change
1981	-3.483
1982	6.791
1983	-0.713
1984	5.024
1985	-6.606
1986	-1.22
1987	-9.166
1988	9.149
1989	-3.101
1990	-1.331
1991	0.134
1992	1.307
1993	1.046
1994	1.754
1995	-0.084
1996	1.141
1997	1.965
1998	6.85
1999	-1.771
2000	5.956
2001	-1.418
2002	3.962
2003	2.006
2004	-1.629
2005	4.952
2006	-0.049
2007	2.035
2008	-2.092
2009	0.803
2010	-0.924
2011	1.595
2012	4.713
2013	4.215
2014	-0.698
2015	10.405
2016	5.13
2017	0.328
2018	2.256
2019	2.273
2020	2.324
2021	2.045
2022	1.931
2023	1.94
2024	1.809