Year	Percent change (Units)
1993	-2.100
1994	4.900
1995	7.666
1996	4.415
1997	-2.372
1998	13.000
1999	-14.783
2000	6.336
2001	4.343
2002	10.141
2003	13.281
2004	11.971
2005	6.822
2006	6.665
2007	6.297
2008	3.856
2009	-4.496
2010	8.618
2011	-2.082
2012	-0.062
2013	4.886
2014	-0.975
2015	2.968
2016	1.851
2017	4.468
2018	5.103
2019	-3.350
2020	-4.394
2021	0.557
2022	-8.407
2023	-15.602
2024	6.544
2025	5.857
2026	4.537
2027	3.966
2028	3.304
2029	3.487