Year	Percent change
1981	6.8
1982	5.9
1983	2.9
1984	3.4
1985	2.3
1987	-1
1988	0.5
1989	1.1
1990	2.5
1991	3.178
1992	2.835
1993	1.643
1994	2.12
1995	1.347
1996	1.448
1997	1.856
1998	1.784
1999	2.037
2000	2.347
2001	5.113
2002	3.852
2003	2.227
2004	1.383
2005	1.491
2006	1.653
2007	1.587
2008	2.213
2009	0.972
2010	0.93
2011	2.47
2012	2.818
2013	2.556
2014	0.321
2015	0.22
2016	0.11
2017	1.299
2018	1.602
2019	2.302
2020	1.638
2021	1.738
2022	1.838
2023	1.938
2024	2.038