Year	Percent
1990	7.446
1991	7.5
1992	7.4
1993	8.3
1994	7.1
1995	7.4
1996	8.785
1997	10.4
1998	11.5
1999	10.99
2000	10.5
2001	10.349
2002	10.2
2003	9.998
2004	9.8
2005	10.892
2006	12.09
2007	13.4
2008	12.636
2009	11.91
2010	6.58
2011	6.7
2012	7.342
2013	8.04
2014	6.91
2015	6.71
2016	6.611
2017	6.43
2018	6.249
2019	6.068
2020	5.888
2021	5.707
2022	5.526
2023	5.345
2024	5.164
2025	4.983
2026	4.802
2027	4.621
2028	4.441
2029	4.26
2030	4.079