Year	Percent change
1980	7.296
1981	0.782
1982	3.454
1983	3.471
1984	3.488
1985	3.505
1986	3.521
1987	3.537
1988	-13.013
1989	-9.582
1990	0.343
1991	9.358
1992	-3.162
1993	-4.1
1994	7.497
1995	6.3
1996	7.4
1997	12.7
1998	2.2
1999	3
2000	0.5
2001	0.844
2002	2.985
2003	1.69
2004	3.67
2005	2.466
2006	3.706
2007	2.595
2008	6.02
2009	4.341
2010	0.391
2011	1.761
2012	5.009
2013	4.631
2014	0.912
2015	3.168
2016	3.191
2017	0.449
2018	1.153
2019	1.487
2020	1.831
2021	2.636
2022	2.788
2023	3
2024	3