Year	Percent change
1981	1.07
1982	-3.049
1983	0.468
1984	7.318
1985	2.061
1986	8.163
1987	4.917
1988	6.508
1989	4.94
1990	3.781
1991	2.304
1992	4.564
1993	4.645
1994	4.186
1995	4.549
1996	2.314
1997	4.88
1998	6.518
1999	4.413
2000	3.272
2001	9.468
2002	2.17
2003	2.341
2004	1.987
2005	-1.987
2006	-1.41
2007	-1.162
2008	-1.844
2009	-1.952
2010	-0.413
2011	-0.359
2012	0.029
2013	-0.307
2014	-1.19
2015	-1.049
2016	-1.327
2017	-2.379
2018	-2.326
2019	-1.147
2020	-0.693
2021	-0.775
2022	-0.775
2023	-0.753
2024	-0.753