Year	Percent change (Units)
1996	8.759
1997	8.596
1998	10.698
1999	2.135
2000	3.775
2001	4.663
2002	1.903
2003	0.119
2004	2.760
2005	1.857
2006	2.534
2007	2.853
2008	6.359
2009	1.019
2010	1.473
2011	1.917
2012	3.288
2013	1.438
2014	0.344
2015	0.309
2016	0.684
2017	2.451
2018	2.149
2019	2.848
2020	3.161
2021	3.840
2022	15.100
2023	10.661
2024	2.138
2025	2.025
2026	2.000
2027	2.000
2028	2.000
2029	2.000