Year	Percent
1990	3.77
1991	3.778
1992	3.773
1993	3.795
1994	3.76
1995	4.68
1996	4.55
1997	5.31
1998	5.96
1999	2.89
2000	3.91
2001	6.48
2002	8.24
2003	6.99
2004	7.94
2005	9.21
2006	8.52
2007	8.78
2008	8.75
2009	8.37
2010	9
2011	9.45
2012	10.16
2013	9.72
2014	10.17
2015	10.95
2016	12.69
2017	12.848
2018	13.006
2019	13.164
2020	13.323
2021	13.481
2022	13.639
2023	13.797
2024	13.955
2025	14.113
2026	14.271
2027	14.43
2028	14.588
2029	14.746
2030	14.904