Year	Percent change (Units)
1990	-1.672
1991	3.500
1992	5.411
1993	-1.008
1994	3.737
1995	9.170
1996	15.700
1997	3.457
1998	7.602
1999	1.398
2000	-5.207
2001	3.958
2002	20.679
2003	5.229
2004	6.632
2005	5.179
2006	5.049
2007	11.875
2008	24.264
2009	25.826
2010	-6.086
2011	-3.224
2012	22.252
2013	2.629
2014	16.775
2015	12.246
2016	-5.146
2017	-0.993
2018	3.442
2019	-9.816
2020	-20.127
2021	31.867
2022	16.483
2023	-3.168
2024	3.423
2025	2.316
2026	3.111
2027	4.359
2028	4.316
2029	5.159