Year	Percent
1990	3.34
1991	3.11
1992	3.64
1993	3.49
1994	3.25
1995	3.17
1996	3.09
1997	3.24
1998	3.38
1999	3.5
2000	3.4
2001	3.05
2002	3.68
2003	3.67
2004	3.95
2005	4.26
2006	4.57
2007	4.53
2008	4.79
2009	5.59
2010	6.22
2011	6.4
2012	6.58
2013	7.02
2014	7.59
2015	7.69
2016	7.72
2017	7.907
2018	8.094
2019	8.282
2020	8.469
2021	8.656
2022	8.843
2023	9.03
2024	9.217
2025	9.405
2026	9.592
2027	9.779
2028	9.966
2029	10.153
2030	10.341