Year	Percent change (Units)
1986	2.682
1987	11.161
1988	3.192
1989	12.250
1990	8.407
1991	0.570
1992	6.776
1993	4.371
1994	6.170
1995	1.710
1996	5.717
1997	3.818
1998	2.145
1999	-0.585
2000	2.748
2001	1.160
2002	9.869
2003	0.000
2004	15.326
2005	1.053
2006	2.083
2007	8.036
2008	8.855
2009	9.978
2010	-0.296
2011	2.868
2012	5.481
2013	-1.732
2014	0.186
2015	0.370
2016	2.256
2017	1.017
2018	5.782
2019	-0.087
2020	-3.282
2021	4.080
2022	10.813
2023	10.661
2024	1.951
2025	2.091
2026	3.000
2027	3.000
2028	3.000
2029	3.000