Year	Percent change (Units)
1993	17.688
1994	-16.795
1995	20.287
1996	21.600
1997	15.603
1998	0.633
1999	7.678
2000	31.462
2001	17.323
2002	0.529
2003	5.475
2004	30.926
2005	23.544
2006	15.300
2007	25.141
2008	11.573
2009	-14.817
2010	-5.604
2011	9.957
2012	24.259
2013	8.673
2014	-8.752
2015	-5.083
2016	-16.875
2017	8.578
2018	7.011
2019	18.209
2020	-23.862
2021	-8.591
2022	14.568
2023	25.196
2024	6.836
2025	3.713
2026	3.395
2027	3.478
2028	3.426
2029	3.374