Year	Percent
1990	1.332
1991	1.492
1992	1.59
1993	1.757
1994	1.74
1995	1.723
1996	1.716
1997	1.642
1998	1.822
1999	1.92
2000	1.758
2001	2.021
2002	2.258
2003	2.28
2004	2.366
2005	2.79
2006	2.266
2007	1.838
2008	1.49
2009	1.998
2010	2.24
2011	2.217
2012	2.073
2013	1.952
2014	1.869
2015	1.776
2016	1.728
2017	1.721
2018	1.714
2019	1.708
2020	1.701
2021	1.694
2022	1.687
2023	1.681
2024	1.674
2025	1.667
2026	1.661
2027	1.654
2028	1.647
2029	1.641
2030	1.634