Year	Percent change
1980	14.945
1981	0.747
1982	-8.625
1983	-22.541
1984	6.158
1985	12.145
1986	4.419
1987	4.729
1988	-22.307
1989	20.487
1990	-7.9
1991	14.951
1992	19.312
1993	9.506
1994	10.103
1995	5.534
1996	10.775
1997	8.934
1998	18.54
1999	-1.505
2000	-13.643
2001	-4.945
2002	-2.377
2003	-1.843
2004	13.78
2005	7.469
2006	7.833
2007	21.091
2008	16.703
2009	-14.807
2010	27.226
2011	27.642
2012	-1.917
2013	-4.202
2014	-2.489
2015	-3.418
2016	1.342
2017	6.809
2018	2.537
2019	2.134
2020	7.506
2021	6.073
2022	5.6
2023	5.574
2024	5.6