Year	Percent change (Units)
1996	19.137
1997	12.940
1998	11.958
1999	-8.197
2000	5.100
2001	13.411
2002	11.901
2003	20.335
2004	5.126
2005	18.246
2006	12.288
2007	35.386
2008	16.952
2009	-16.591
2010	4.133
2011	-1.918
2012	5.404
2013	9.687
2014	3.174
2015	-10.266
2016	5.925
2017	22.568
2018	14.343
2019	13.697
2020	-31.509
2021	2.817
2022	49.651
2023	46.223
2024	-6.487
2025	-0.297
2026	5.911
2027	6.642
2028	6.249
2029	6.700