Year	Percent change
1980	4.096
1981	-3.606
1982	4.926
1983	-1.194
1984	-1.334
1985	7.545
1986	17.189
1987	24.787
1988	16.087
1989	17.712
1990	9.624
1991	10.339
1992	6.823
1993	-5.224
1994	11.447
1995	11.275
1996	8.822
1997	13.272
1998	14.845
1999	13.657
2000	10.822
2001	3.502
2002	3.578
2003	5.906
2004	10.082
2005	7.026
2006	8.165
2007	8.564
2008	-5.619
2009	-18.313
2010	6.92
2011	-0.805
2012	-6.351
2013	-0.511
2014	6.592
2015	5.436
2016	2.919
2017	5.552
2018	3.64
2019	2.714
2020	3.188
2021	3.341
2022	2.859
2023	2.18
2024	2.011