Year	Percent change (Units)
1994	11.112
1995	1.836
1996	9.548
1997	16.102
1998	23.804
1999	-0.653
2000	9.522
2001	-2.448
2002	3.548
2003	-18.186
2004	-7.884
2005	15.244
2006	13.697
2007	7.592
2008	4.530
2009	-9.313
2010	34.287
2011	-0.267
2012	1.933
2013	-4.606
2014	5.773
2015	19.187
2016	8.984
2017	-4.095
2018	5.482
2019	5.100
2020	-11.471
2021	18.088
2022	15.819
2023	-4.070
2024	3.362
2025	2.672
2026	2.512
2027	2.814
2028	3.747
2029	4.589