Year	Percent change
1980	10.752
1981	4.121
1982	9.953
1983	8.152
1984	5.4
1985	-19.186
1986	-6.999
1987	11.202
1988	26.946
1989	33.704
1990	24.4
1991	24.549
1992	3.089
1993	11.781
1994	29.883
1995	27.707
1996	1.461
1997	4.188
1998	-17.761
1999	10.453
2000	23.698
2001	-8.146
2002	6.565
2003	2.246
2004	22.955
2005	4.668
2006	15.874
2007	1.673
2008	-5.086
2009	-23.454
2010	18.121
2011	4.597
2012	0.257
2013	5.864
2014	4.13
2015	1.273
2016	0.521
2017	12.833
2018	0.49
2019	10.012
2020	4.075
2021	4.347
2022	4.344
2023	4.164
2024	4.144