Year	Percent change
1980	10.359
1981	17.241
1982	-27.359
1983	-32.414
1984	-13.595
1985	-22.497
1986	26.068
1987	-11.068
1988	23.353
1989	-2.52
1990	22.235
1991	32.12
1992	2.784
1993	-1.9
1994	9.192
1995	3.718
1996	-1.988
1997	3.837
1998	1.791
1999	-8.711
2000	4.056
2001	-0.955
2002	-8.529
2003	20.493
2004	9.139
2005	12.807
2006	2.778
2007	3.718
2008	-4.049
2009	-8.561
2010	7.47
2011	10.195
2012	4.221
2013	1.951
2014	1.938
2015	4.052
2016	5.895
2017	-0.423
2018	7.551
2019	0.753
2020	1.103
2021	1.264
2022	1.962
2023	1.367
2024	1.748