Year	Percent change
1980	6.661
1981	6.407
1982	4.726
1983	3.785
1984	5.049
1985	2.804
1986	1.104
1987	1.642
1988	1.866
1989	2.479
1990	3.13
1991	2.73
1992	3.741
1993	3.096
1994	2.388
1995	0.555
1996	2.234
1997	0.913
1998	0.425
1999	1.651
2000	1.853
2001	1.819
2002	1.696
2003	1.337
2004	2.512
2005	1.519
2006	1.642
2007	3.456
2008	1.492
2009	1.04
2010	2.171
2011	3.319
2012	2.81
2013	1.856
2014	0.709
2015	0.975
2016	1.533
2017	2.285
2018	1.707
2019	1.9
2020	2
2021	2.1
2022	2.1
2023	2
2024	2