Year	Percent change
1980	17.47
1981	14.332
1982	11.635
1983	15.175
1984	13.335
1985	7.623
1986	7.694
1987	10.752
1988	7.758
1989	11.432
1990	11.064
1991	3.8
1992	6.486
1993	10.791
1994	8.814
1995	5.272
1996	3.286
1997	3.662
1998	5.603
1999	3.414
2000	3.524
2001	5.602
2002	4.142
2003	3.781
2004	3.757
2005	6.878
2006	8.308
2007	7.875
2008	12.036
2009	7.01
2010	10.525
2011	5.102
2012	9.28
2013	5.189
2014	5.698
2015	4.659
2016	3.069
2017	1.884
2018	1.062
2019	1.137
2020	2.157
2021	2.487
2022	2.637
2023	2.881
2024	3