Year	Percent change (Units)
1982	-9.504
1983	5.253
1984	5.240
1985	-4.258
1986	8.565
1987	8.142
1988	-10.050
1989	25.896
1990	-26.229
1991	-41.008
1992	82.809
1993	35.132
1994	8.616
1995	1.669
1996	0.598
1997	2.493
1998	3.654
1999	-1.789
2000	4.690
2001	0.213
2002	3.014
2003	17.326
2004	10.240
2005	10.609
2006	7.515
2007	5.992
2008	2.480
2009	-7.076
2010	-2.371
2011	9.628
2012	6.626
2013	1.149
2014	0.501
2015	0.593
2016	2.926
2017	-4.712
2018	2.434
2019	1.382
2020	-5.274
2021	1.698
2022	6.138
2023	-2.231
2024	-1.437
2025	3.803
2026	2.487
2027	2.589
2028	2.601
2029	2.612