Year	Percent change (Units)
1982	0.000
1983	1.166
1984	3.098
1985	2.131
1986	1.781
1987	1.247
1988	1.193
1989	1.304
1990	2.139
1991	1.600
1992	1.280
1993	4.252
1994	2.463
1995	5.967
1996	1.996
1997	1.712
1998	-0.441
1999	-0.416
2000	1.558
2001	0.596
2002	-2.315
2003	0.300
2004	0.814
2005	1.244
2006	0.160
2007	0.968
2008	2.085
2009	1.036
2010	0.357
2011	0.138
2012	0.112
2013	0.389
2014	-0.207
2015	-0.488
2016	-0.279
2017	-1.261
2018	1.025
2019	-0.391
2020	1.940
2021	1.733
2022	3.683
2023	0.370
2024	1.300
2025	1.000
2026	1.000
2027	1.000
2028	1.000
2029	1.000