Year	Percent change (Units)
1993	20.500
1994	14.210
1995	13.140
1996	2.495
1997	13.397
1998	10.768
1999	8.954
2000	6.720
2001	3.803
2002	5.213
2003	7.068
2004	15.756
2005	7.548
2006	12.910
2007	16.491
2008	3.182
2009	-19.845
2010	7.570
2011	5.967
2012	-4.337
2013	2.933
2014	3.795
2015	5.144
2016	6.583
2017	10.700
2018	7.418
2019	4.988
2020	-8.579
2021	17.245
2022	7.741
2023	-5.954
2024	5.421
2025	5.250
2026	4.250
2027	4.510
2028	4.450
2029	4.460