Year	Percent change (Units)
1996	11.952
1997	12.246
1998	14.432
1999	-2.515
2000	23.210
2001	3.118
2002	4.824
2003	14.080
2004	4.775
2005	9.970
2006	15.373
2007	10.058
2008	7.051
2009	-5.935
2010	12.458
2011	7.690
2012	3.971
2013	5.068
2014	5.514
2015	6.589
2016	9.005
2017	9.046
2018	6.759
2019	5.337
2020	-1.088
2021	12.335
2022	6.743
2023	-1.941
2024	6.465
2025	3.035
2026	4.000
2027	4.000
2028	4.000
2029	4.000