Year	Percent change (Units)
1993	31.930
1994	20.872
1995	13.572
1996	9.919
1997	8.342
1998	7.948
1999	6.121
2000	8.935
2001	8.380
2002	7.481
2003	5.544
2004	3.593
2005	2.452
2006	2.458
2007	3.657
2008	5.647
2009	0.839
2010	1.801
2011	1.803
2012	2.597
2013	1.769
2014	0.199
2015	-0.526
2016	-0.055
2017	1.429
2018	1.739
2019	1.631
2020	-0.055
2021	1.917
2022	8.834
2023	7.447
2024	2.733
2025	1.968
2026	2.033
2027	2.012
2028	2.004
2029	2.004