Year	Percent change
1980	7.301
1981	1.912
1982	-17.767
1983	3.16
1984	11.672
1985	0.933
1986	-6.63
1987	-3.269
1988	-9.832
1989	16.237
1990	104.529
1991	-5.4
1992	13.1
1993	14.6
1994	5.8
1995	30.849
1996	2.52
1997	7.3
1998	18.6
1999	-0.4
2000	29.533
2001	20.986
2002	13.026
2003	17.289
2004	22.869
2005	14.985
2006	23.702
2007	28.623
2008	9.786
2009	-24.652
2010	20.187
2011	9.81
2012	-2.836
2013	7.287
2014	10.067
2015	8.073
2016	17.687
2017	9.649
2018	9.657
2019	5.859
2020	4.942
2021	4.687
2022	4.57
2023	4.391
2024	4.357