Year	Percent change
1980	-7.449
1981	2.041
1982	-2.524
1983	13.593
1984	24.183
1985	6.256
1986	10.233
1987	4.663
1988	4.053
1989	4.304
1990	2.915
1991	0.454
1992	9.426
1993	10.005
1994	13.353
1995	9.007
1996	9.376
1997	14.409
1998	11.849
1999	12.874
2000	12.961
2001	-3.361
2002	3.659
2003	5.814
2004	11.44
2005	7.032
2006	6.236
2007	2.062
2008	-3.363
2009	-15.305
2010	15.442
2011	6.143
2012	2.625
2013	1.762
2014	5.584
2015	5.762
2016	1.382
2017	4.607
2018	4.914
2019	4.316
2020	3.328
2021	3.875
2022	3.068
2023	2.896
2024	2.334