Year	Percent
1990	11.455
1991	11.48
1992	11.431
1993	11.453
1994	11.425
1995	11.19
1996	14.05
1997	15.17
1998	10.77
1999	12.39
2000	9.77
2001	12.7
2002	9.09
2003	13.31
2004	16.02
2005	12.77
2006	16.82
2007	14.46
2008	14.28
2009	12.57
2010	11.04
2011	10.6
2012	12.83
2013	13.34
2014	14.43
2015	13.83
2016	14.58
2017	14.565
2018	14.549
2019	14.534
2020	14.519
2021	14.504
2022	14.488
2023	14.473
2024	14.458
2025	14.442
2026	14.427
2027	14.412
2028	14.397
2029	14.381
2030	14.366