Year	Percent change
1980	17.359
1981	14.818
1982	11.703
1983	13.121
1984	11.705
1985	22.318
1986	31.945
1987	24.849
1988	19.772
1989	17.651
1990	28.294
1991	14.409
1992	11.221
1993	18.505
1994	10.584
1995	10.03
1996	9.79
1997	4.49
1998	2.549
1999	0.513
2000	2.274
2001	3.745
2002	1.869
2003	2.121
2004	4.452
2005	4.69
2006	4.035
2007	4.58
2008	7.258
2009	0.537
2010	1.179
2011	5.129
2012	1.73
2013	0.758
2014	1.141
2015	-0.731
2016	0.604
2017	1.014
2018	1.088
2019	0.647
2020	1.299
2021	1.099
2022	1.1
2023	0.999
2024	1.001