Year	Percent
1990	6.229
1991	6.243
1992	6.215
1993	6.228
1994	6.212
1995	6.08
1996	5.99
1997	9.19
1998	4.62
1999	6.11
2000	6.34
2001	6.09
2002	7.74
2003	7.19
2004	7.57
2005	8.6
2006	8.87
2007	9.22
2008	8.48
2009	7.46
2010	7.7
2011	9.3
2012	9.54
2013	9.39
2014	8.94
2015	10.65
2016	12.61
2017	12.62
2018	12.629
2019	12.639
2020	12.649
2021	12.659
2022	12.668
2023	12.678
2024	12.688
2025	12.698
2026	12.707
2027	12.717
2028	12.727
2029	12.737
2030	12.746