Year	Percent
1990	9.853
1991	9.879
1992	9.829
1993	10.548
1994	10.289
1995	10.339
1996	10.1
1997	13.2
1998	7.06
1999	6.95
2000	5.09
2001	5.23
2002	5.44
2003	4.66
2004	6.86
2005	5.61
2006	7.97
2007	8.36
2008	8.89
2009	6.78
2010	5.04
2011	4.79
2012	5.22
2013	6.09
2014	5.79
2015	6.24
2016	7.18
2017	7.076
2018	6.972
2019	6.867
2020	6.763
2021	6.659
2022	6.555
2023	6.45
2024	6.346
2025	6.242
2026	6.138
2027	6.033
2028	5.929
2029	5.825
2030	5.721