Year	Percent change (Units)
1982	72.950
1983	125.072
1984	111.458
1985	158.257
1986	62.898
1987	114.534
1988	1722.054
1989	2775.297
1990	7649.726
1991	139.230
1992	56.734
1993	39.480
1994	15.383
1995	10.228
1996	11.840
1997	6.463
1998	6.007
1999	3.727
2000	3.734
2001	-0.127
2002	1.516
2003	2.484
2004	3.481
2005	1.494
2006	1.138
2007	3.928
2008	6.650
2009	0.245
2010	2.073
2011	4.747
2012	2.644
2013	2.858
2014	3.230
2015	4.394
2016	3.235
2017	1.365
2018	2.193
2019	1.900
2020	1.973
2021	6.427
2022	8.460
2023	3.237
2024	2.401
2025	2.018
2026	2.018
2027	2.018
2028	2.018
2029	2.000