Year	Percent change
1980	-4.407
1981	1.628
1982	-3.693
1983	4.977
1984	9.751
1985	3.158
1986	5.204
1987	7.298
1988	6.434
1989	13.886
1990	6.024
1991	2.439
1992	8.063
1993	7.529
1994	15.48
1995	15.93
1996	12.842
1997	16.645
1998	27.857
1999	12.61
2000	21.665
2001	13.084
2002	5.333
2003	-2.446
2004	1.895
2005	12.758
2006	9.315
2007	9.335
2008	-2.812
2009	-1.707
2010	0.463
2011	2.718
2012	-0.938
2013	0.969
2014	14.521
2015	33.214
2016	18.515
2017	-9.327
2018	2.7
2019	4.45
2020	4.64
2021	4.597
2022	4.6
2023	4.6
2024	4.6