Year	Percent
1991	5.83
1992	5.969
1993	6.444
1994	6.808
1995	6.35
1996	5.36
1997	5.34
1998	9.916
1999	0.521
2000	3.398
2001	4.177
2002	6.059
2003	6.965
2004	8.797
2005	8.432
2006	8.977
2007	9.882
2008	9.525
2009	7.625
2010	6.444
2011	6.669
2012	6.382
2013	5.768
2014	6.82
2015	7.056
2016	7.539
2017	7.507
2018	7.709
2019	7.757
2020	7.593
2021	7.547
2022	7.494