Year	Percent change (Units)
1992	3.300
1993	4.200
1994	2.500
1995	1.500
1996	1.457
1997	1.445
1998	0.130
1999	1.423
2000	2.041
2001	1.375
2002	0.986
2003	1.099
2004	2.174
2005	2.128
2006	1.389
2007	3.082
2008	0.997
2009	0.877
2010	1.848
2011	2.348
2012	2.086
2013	1.328
2014	0.202
2015	0.201
2016	1.707
2017	1.579
2018	1.846
2019	1.336
2020	-0.534
2021	5.428
2022	10.805
2023	2.971
2024	2.222
2025	1.959
2026	1.971
2027	1.974
2028	1.988
2029	2.009