Year	Percent change (Units)
1994	25.900
1995	19.371
1996	-2.468
1997	12.281
1998	10.426
1999	-3.639
2000	-6.949
2001	6.331
2002	2.821
2003	10.174
2004	17.293
2005	19.923
2006	9.529
2007	12.616
2008	0.897
2009	-20.308
2010	24.216
2011	24.173
2012	4.826
2013	2.801
2014	2.640
2015	-1.502
2016	4.822
2017	4.832
2018	2.899
2019	5.031
2020	-5.454
2021	22.128
2022	3.008
2023	-6.869
2024	-4.784
2025	3.062
2026	3.700
2027	4.000
2028	3.321
2029	2.700