Year	Percent
1990	10.993
1991	11.32
1992	8.7
1993	7.32
1994	6.74
1995	5.83
1996	6.59
1997	5.85
1998	6.54
1999	6.28
2000	6.19
2001	6.07
2002	6.18
2003	5.77
2004	4.96
2005	4.87
2006	5.5
2007	5.74
2008	6.59
2009	6.72
2010	6.3
2011	6.2
2012	6.68
2013	7.39
2014	8.01
2015	8.19
2016	8.3
2017	8.396
2018	8.492
2019	8.588
2020	8.684
2021	8.78
2022	8.876
2023	8.972
2024	9.068
2025	9.164
2026	9.26
2027	9.357
2028	9.453
2029	9.549
2030	9.645