Year	Percent change
1980	17.079
1981	15.451
1982	16.126
1983	7.445
1984	6.129
1985	15.38
1986	13.221
1987	15.762
1988	6.351
1989	5.691
1990	6.063
1991	2.645
1992	0.998
1993	1.317
1994	1.706
1995	3.754
1996	2.309
1997	1.166
1998	1.264
1999	-0.11
2000	2.61
2001	2.651
2002	2.653
2003	1.734
2004	2.306
2005	3.038
2006	3.361
2007	2.393
2008	3.925
2009	2.162
2010	2.257
2011	4.084
2012	1.034
2013	1.128
2014	1.22
2015	0.308
2016	0.639
2017	1.854
2018	1.647
2019	1.955
2020	1.939
2021	2.015
2022	2.015
2023	2.015
2024	2.015