Year	Percent change (Units)
1982	100.000
1983	150.000
1984	20.000
1985	150.000
1986	146.667
1987	240.541
1988	198.413
1989	77.128
1990	26.877
1991	32.325
1992	66.310
1993	-2.358
1994	7.657
1995	11.463
1996	5.433
1997	10.433
1998	-0.900
1999	8.454
2000	4.218
2001	-4.424
2002	5.722
2003	5.907
2004	8.004
2005	3.673
2006	10.884
2007	5.183
2008	14.234
2009	10.938
2010	3.083
2011	27.009
2012	5.243
2013	6.739
2014	1.794
2015	6.448
2016	5.649
2017	3.006
2018	2.321
2019	2.372
2020	2.457
2021	2.880
2022	10.231
2023	2.603
2024	4.355
2025	5.042
2026	5.035
2027	5.000
2028	5.000
2029	5.000