Year	Percent
1990	1.894
1991	1.89
1992	1.899
1993	1.944
1994	1.937
1995	1.94
1996	1.942
1997	1.924
1998	1.924
1999	1.935
2000	1.94
2001	1.922
2002	1.904
2003	1.877
2004	1.838
2005	1.819
2006	1.806
2007	1.788
2008	1.775
2009	1.766
2010	1.749
2011	1.731
2012	1.722
2013	1.714
2014	1.71
2015	1.715
2016	1.768
2017	1.754
2018	1.74
2019	1.725
2020	1.711
2021	1.697
2022	1.683
2023	1.668
2024	1.654
2025	1.64
2026	1.625
2027	1.611
2028	1.597
2029	1.583
2030	1.568