Year	Percent change
1980	12.127
1981	16.3
1982	11.2
1983	10.5
1984	8.6
1985	8.1
1986	10
1987	9.8
1988	8.4
1989	11.6
1990	11.4
1991	12.6
1992	16.5
1993	14.4
1994	10.6
1995	10.5
1996	10.1
1997	8.9
1998	6.51
1999	7.816
2000	8.534
2001	6.565
2002	8.026
2003	9.185
2004	6.988
2005	8.61
2006	11.553
2007	7.077
2008	12.623
2009	8.108
2010	6.95
2011	8.473
2012	7.537
2013	5.882
2014	4.415
2015	3.054
2016	2.81
2017	3.296
2018	3.241
2019	3.616
2020	3.8
2021	3.9
2022	3.95
2023	3.95
2024	3.95