Year	Percent change
1980	13.516
1981	10.512
1982	-0.854
1983	6.577
1984	1.179
1985	0.585
1986	2.397
1987	2.244
1988	0.478
1989	3.323
1990	3.952
1991	2.032
1992	2.02
1993	-0.336
1994	2.229
1995	0.505
1996	-2.059
1997	1.804
1998	2.7
1999	6.3
2000	6.3
2001	6
2002	0.2
2003	3.3
2004	3.9
2005	0.648
2006	-1.858
2007	5.324
2008	36.965
2009	31.754
2010	-2.405
2011	2.559
2012	7.11
2013	4.339
2014	1.386
2015	4.042
2016	-1.014
2017	2.859
2018	3.699
2019	3.356
2020	2.982
2021	3.02
2022	3.023
2023	3
2024	3