Year	Percent change
1980	13.53
1981	17.3
1982	24.4
1983	52.5
1984	25.1
1985	24.4
1986	27.3
1987	32.5
1988	85.7
1989	54.2
1990	49.5
1991	49
1992	60.2
1993	32
1994	25.383
1995	22.774
1996	25.527
1997	30.7
1998	43.4
1999	60.7
2000	91.005
2001	22.422
2002	9.361
2003	6.072
2004	1.949
2005	3.132
2006	2.869
2007	3.319
2008	8.832
2009	4.312
2010	3.328
2011	5.409
2012	4.164
2013	2.701
2014	3.667
2015	3.38
2016	1.12
2017	-0.197
2018	0.266
2019	0.537
2020	1.64
2021	1.45
2022	1.196
2023	1.026
2024	0.962