Year	Percent change (Units)
1990	-11.032
1991	28.800
1992	6.366
1993	10.657
1994	-3.386
1995	9.529
1996	2.800
1997	-2.724
1998	-0.700
1999	4.431
2000	-0.868
2001	-4.475
2002	-2.331
2003	6.325
2004	27.400
2005	-1.197
2006	17.564
2007	1.908
2008	9.184
2009	-4.494
2010	5.563
2011	-6.899
2012	2.284
2013	-6.829
2014	0.636
2015	-11.289
2016	9.511
2017	20.105
2018	10.449
2019	-7.453
2020	-15.268
2021	11.879
2022	22.588
2023	3.057
2024	8.144
2025	5.052
2026	1.169
2027	3.572
2028	2.314
2029	3.267