Year	Percent change
1980	15.287
1981	3.968
1982	-5.382
1983	-1.479
1984	3.056
1985	2.62
1986	9.541
1987	-1.384
1988	7.614
1989	15.139
1990	-0.022
1991	4.948
1992	5.932
1993	5.921
1994	17.745
1995	17.955
1996	14.989
1997	16.465
1998	-13.998
1999	-39.849
2000	20.141
2001	-2.003
2002	6.971
2003	8.491
2004	12.076
2005	1.59
2006	16.421
2007	4.179
2008	1.165
2009	-1.512
2010	19.356
2011	-1.203
2012	18.249
2013	1.753
2014	15.736
2015	3.004
2016	10.818
2017	25.224
2018	7.78
2019	14.7
2020	12.573
2021	7
2022	6.997
2023	6.997
2024	6.566