Year	Percent change
1986	18.372
1987	9.524
1988	4.734
1989	7.156
1990	4.745
1991	1.007
1992	1.329
1993	1.475
1994	2.746
1995	2.83
1996	2.599
1997	0.894
1998	0.295
1999	0.589
2000	3.953
2001	1.831
2002	2.628
2003	1.617
2004	2.653
2005	3.23
2006	2.628
2007	3.171
2008	3.31
2009	2.059
2010	3.924
2011	1.942
2012	0.952
2013	1.572
2014	0.722
2015	0.102
2016	1.331
2017	1.616
2018	2.095
2019	1.863
2020	2.015
2021	2.015
2022	2.015
2023	0.5
2024	0.5