Year	Percent change
1980	2.614
1981	6.967
1982	16.21
1983	7.997
1984	23.869
1985	8.362
1986	-5.579
1987	17.98
1988	-6.403
1989	-10.3
1990	-19.576
1991	7.859
1992	-12.93
1993	-3.49
1994	-14.793
1995	9.975
1996	2.975
1997	14.899
1998	18.853
1999	-17.39
2000	-4.136
2001	43.874
2002	-13.61
2003	22.193
2004	68.053
2005	18.587
2006	-5.919
2007	25.63
2008	13.556
2009	17.591
2010	33.358
2011	11.268
2012	22.07
2013	-5.063
2014	25.585
2015	26.108
2016	17.354
2017	-13.802
2018	-0.632
2019	9.592
2020	1.952
2021	1.711
2022	2.577
2023	5.668
2024	6.854