Year	Percent change
1980	11.515
1981	9.151
1982	8.786
1983	7.83
1984	3.659
1985	4.247
1986	3.175
1987	2.923
1988	6.726
1989	11.391
1990	36.421
1991	21.212
1992	6.429
1993	13.087
1994	29.08
1995	26.667
1996	25.408
1997	12.735
1998	15.661
1999	10.988
2000	10.1
2001	8.81
2002	8.097
2003	6.795
2004	9.183
2005	7.748
2006	5.286
2007	8.873
2008	10.831
2009	2.951
2010	6.485
2011	5.605
2012	5.438
2013	4.964
2014	5.773
2015	2.357
2016	3.315
2017	4.728
2018	4.224
2019	4.7
2020	4.465
2021	4.242
2022	4.03
2023	4
2024	4