Year	Percent change
1980	64.22
1981	9.356
1982	3.675
1983	9.695
1984	0.912
1985	-9.752
1986	-0.816
1987	3.651
1988	-0.327
1989	18.092
1990	-3.609
1991	18.025
1992	25.557
1993	18.12
1994	12.238
1995	13.153
1996	8.447
1997	18.549
1998	15.559
1999	7.738
2000	-11.541
2001	16.549
2002	-0.213
2003	10.478
2004	20.422
2005	7.976
2006	10.73
2007	47.126
2008	11.67
2009	-19.853
2010	3.113
2011	45.614
2012	-7.06
2013	14.938
2014	17.448
2015	16.11
2016	23.528
2017	3.769
2018	5.745
2019	0.316
2020	0.198
2021	7.509
2022	5.445
2023	5.745
2024	7.84