Year	Percent change (Units)
1992	1.772
1993	5.874
1994	-3.061
1995	9.820
1996	5.819
1997	-4.045
1998	2.778
1999	3.673
2000	-3.918
2001	-0.799
2002	1.381
2003	6.928
2004	4.733
2005	8.566
2006	18.333
2007	-1.969
2008	-0.331
2009	0.098
2010	2.620
2011	4.173
2012	4.470
2013	4.151
2014	4.275
2015	5.376
2016	1.261
2017	6.271
2018	4.773
2019	3.146
2020	-0.429
2021	0.737
2022	6.364
2023	4.811
2024	5.052
2025	5.548
2026	4.464
2027	5.596
2028	4.294
2029	2.166