Year	Percent change (Units)
1996	9.801
1997	9.953
1998	8.407
1999	-10.734
2000	6.150
2001	4.162
2002	15.232
2003	23.570
2004	-2.199
2005	22.651
2006	12.833
2007	36.852
2008	20.016
2009	-21.341
2010	2.670
2011	-1.796
2012	3.477
2013	8.555
2014	0.873
2015	-16.578
2016	6.895
2017	28.120
2018	14.527
2019	13.120
2020	-17.326
2021	-0.447
2022	42.476
2023	48.578
2024	-8.768
2025	-1.374
2026	5.394
2027	6.304
2028	5.889
2029	6.886