Year	Percent change
1980	13.808
1981	7.3
1982	4.251
1983	2.103
1984	1.583
1985	1.027
1986	-0.066
1987	0.996
1988	0.359
1989	0.116
1990	0.769
1991	1.547
1992	1.751
1993	0.478
1994	1.332
1995	0.939
1996	1.264
1997	1.255
1998	0.628
1999	1.3
2000	1.446
2001	0.314
2002	0.998
2003	0.058
2004	0.475
2005	2.86
2006	2.458
2007	4.169
2008	8.759
2009	2.409
2010	3.491
2011	5.876
2012	5.698
2013	4.027
2014	2.626
2015	0.134
2016	0.74
2017	0.876
2018	0.762
2019	1.5
2020	2
2021	2.027
2022	2.008
2023	2.006
2024	2