Year	Percent change
1980	19.023
1981	16.315
1982	2.955
1983	1.36
1984	-0.024
1985	-0.154
1986	0.693
1987	0.515
1988	1.286
1989	4.414
1990	4.126
1991	4.254
1992	4.278
1993	2.98
1994	3.798
1995	3.928
1996	2.888
1997	0.898
1998	1.479
1999	0.371
2000	1.185
2001	-0.198
2002	-0.198
2003	-0.187
2004	1.642
2005	1.857
2006	0.945
2007	1.82
2008	2.95
2009	-0.411
2010	1.123
2011	1.367
2012	1.618
2013	1.015
2014	1.349
2015	-0.605
2016	1.029
2017	1.1
2018	1.456
2019	1.145
2020	1.223
2021	1.443
2022	1.437
2023	1.403
2024	1.437