Year	Percent change
1980	33.04
1981	26.45
1982	13.384
1983	7.452
1984	5.525
1985	8.321
1986	4.336
1987	0.719
1988	3.6
1989	13.61
1990	10.705
1991	12.817
1992	2.857
1993	15.288
1994	7.335
1995	6.026
1996	6.553
1997	6.831
1998	6.808
1999	6.882
2000	4.217
2001	5.391
2002	6.414
2003	2.686
2004	4.71
2005	4.937
2006	8.914
2007	8.825
2008	9.723
2009	2.524
2010	2.924
2011	6.532
2012	3.86
2013	3.535
2014	3.224
2015	1.275
2016	0.999
2017	3.675
2018	3.231
2019	2.075
2020	3.69
2021	3.515
2022	3.428
2023	3.384
2024	3.362