Year	Percent change
1980	5.019
1981	7.92
1982	8.235
1983	10.645
1984	22.106
1985	18.32
1986	56.556
1987	23.712
1988	11.549
1989	8.255
1990	12.168
1991	8.642
1992	9.484
1993	6.466
1994	1.71
1995	6.981
1996	1.099
1997	2.781
1998	1.114
1999	3.807
2000	0.851
2001	4.492
2002	8.61
2003	17.032
2004	14.287
2005	4.959
2006	2.056
2007	5.37
2008	4.451
2009	4.554
2010	5.049
2011	4.796
2012	4.645
2013	5.241
2014	6.262
2015	6.808
2016	7.225
2017	8.049
2018	6.524
2019	6.298
2020	5.991
2021	5.258
2022	5.011
2023	5.011
2024	5.011