Year	Percent change (Units)
1993	16.800
1994	12.800
1995	10.800
1996	2.397
1997	11.690
1998	10.059
1999	8.409
2000	6.619
2001	3.623
2002	5.625
2003	6.464
2004	13.969
2005	7.337
2006	12.388
2007	17.057
2008	4.090
2009	-18.386
2010	6.633
2011	5.315
2012	-3.536
2013	2.111
2014	4.157
2015	4.318
2016	6.289
2017	10.672
2018	7.086
2019	4.669
2020	-9.118
2021	17.787
2022	8.992
2023	-5.069
2024	5.184
2025	5.123
2026	4.335
2027	4.554
2028	4.504
2029	4.513