Year	Percent change (Units)
1993	-14.054
1994	5.400
1995	8.033
1996	5.169
1997	3.387
1998	6.271
1999	3.170
2000	5.853
2001	9.468
2002	14.807
2003	14.052
2004	10.473
2005	14.113
2006	13.198
2007	13.749
2008	6.948
2009	-14.150
2010	2.200
2011	4.700
2012	7.134
2013	3.412
2014	3.607
2015	3.254
2016	0.195
2017	7.518
2018	5.225
2019	7.631
2020	-7.151
2021	5.684
2022	12.604
2023	8.714
2024	6.011
2025	5.250
2026	4.500
2027	4.500
2028	4.500
2029	4.500