Year	Percent
1990	5.25
1991	4.43
1992	4.44
1993	4.34
1994	4.34
1995	4.19
1996	4.44
1997	4.38
1998	4.34
1999	4.24
2000	4.38
2001	4.29
2002	4.34
2003	4.12
2004	4.32
2005	5.07
2006	5.03
2007	5.34
2008	5.75
2009	5.85
2010	5.7
2011	6.63
2012	7.13
2013	7.73
2014	8.23
2015	8.59
2016	9.33
2017	9.477
2018	9.623
2019	9.77
2020	9.917
2021	10.064
2022	10.21
2023	10.357
2024	10.504
2025	10.65
2026	10.797
2027	10.944
2028	11.091
2029	11.237
2030	11.384