Year	Percent change (Units)
1993	38.109
1994	13.155
1995	24.858
1996	33.506
1997	8.964
1998	20.357
1999	-5.351
2000	2.675
2001	15.639
2002	2.711
2003	11.865
2004	20.656
2005	17.055
2006	21.879
2007	17.446
2008	-11.140
2009	-30.894
2010	12.806
2011	22.780
2012	5.247
2013	-0.127
2014	3.000
2015	1.647
2016	3.565
2017	8.546
2018	6.338
2019	2.224
2020	-1.143
2021	15.061
2022	11.094
2023	-2.857
2024	3.000
2025	2.500
2026	2.500
2027	2.500
2028	2.500
2029	2.500