Year	Percent change (Units)
1992	3.869
1993	5.408
1994	5.737
1995	4.706
1996	2.631
1997	2.427
1998	2.018
1999	-0.577
2000	2.368
2001	1.424
2002	1.384
2003	1.793
2004	3.073
2005	3.483
2006	3.544
2007	8.168
2008	9.249
2009	2.166
2010	2.798
2011	7.620
2012	1.063
2013	1.063
2014	3.431
2015	-1.610
2016	2.407
2017	-0.843
2018	1.972
2019	3.265
2020	0.302
2021	2.549
2022	3.583
2023	3.300
2024	1.844
2025	1.972
2026	2.060
2027	2.154
2028	2.206
2029	2.235