Year	Percent change
1980	8.382
1981	-17.154
1982	-3.837
1983	-4.414
1984	10.794
1985	5.817
1986	-1.336
1987	-4.448
1988	10.261
1989	5
1990	6.2
1991	6.6
1992	5.6
1993	-5.8
1994	5.2
1995	21.4
1996	-2.1
1997	6.1
1998	10.646
1999	1.59
2000	1.777
2001	8.322
2002	-6.19
2003	19.975
2004	8.757
2005	27.553
2006	22.083
2007	-11.28
2008	23.347
2009	-42.026
2010	6.513
2011	33.956
2012	-2.81
2013	9.272
2014	-9.873
2015	-7.983
2016	-19.786
2017	4.519
2018	-2.447
2019	-14.279
2020	2.909
2021	2.696
2022	2.67
2023	1.983
2024	1.658