Year	Percent change (Units)
1980	0.000
1981	0.000
1982	0.000
1983	0.000
1984	0.000
1985	0.000
1986	0.000
1987	0.000
1988	0.000
1990	0.000
1991	0.000
1992	0.000
1993	0.000
1994	0.000
1995	0.000
1997	-9.901
1998	28.907
1999	38.743
2000	-3.432
2001	23.272
2002	11.868
2003	8.409
2004	10.704
2005	8.434
2006	5.360
2007	18.950
2008	3.567
2009	-2.225
2010	-9.360
2011	3.639
2012	-7.604
2013	-0.612
2014	5.418
2015	0.070
2016	8.264
2017	6.032
2018	5.766
2019	4.719
2020	-19.547
2021	23.655
2022	11.680
2023	6.736
2024	8.854
2025	5.160
2026	5.112
2027	5.079
2028	5.254
2029	5.869