Year	Percent change
1980	-6
1981	-10
1982	-4.846
1983	5.6
1984	-0.366
1985	3.862
1986	3.494
1987	2.302
1988	3.285
1989	3.812
1990	-7.171
1991	-7.005
1992	2.033
1993	4.287
1994	5.239
1995	6.728
1996	6.239
1997	7.086
1998	4.982
1999	4.524
2000	4.26
2001	1.205
2002	1.443
2003	3.562
2004	5.136
2005	3.494
2006	6.18
2007	7.035
2008	4.25
2009	2.82
2010	3.607
2011	5.017
2012	1.608
2013	1.392
2014	3.318
2015	3.839
2016	3.063
2017	4.806
2018	5.099
2019	3.769
2020	3.138
2021	2.833
2022	2.811
2023	2.772
2024	2.777