Year	Percent change
1980	-7.348
1981	14.9
1982	10.879
1983	9.733
1984	7.908
1985	5.201
1986	29.867
1987	7.697
1988	10.326
1989	3.968
1990	5.632
1991	13.921
1992	8.597
1993	1.81
1994	3.922
1995	-0.48
1996	2.674
1997	1.898
1998	3.274
1999	4.464
2000	6.328
2001	8.29
2002	10.359
2003	11.639
2004	10.973
2005	8.666
2006	6.149
2007	5.842
2008	10.447
2009	1.427
2010	3.535
2011	6.271
2012	1.148
2013	2.11
2014	1.171
2015	-1.054
2016	2.58
2017	7.369
2018	3.863
2019	5.817
2020	4.969
2021	4.151
2022	2.942
2023	2.5
2024	2.5