Year	Percent
1990	2.463
1991	2.476
1992	2.479
1993	2.437
1994	2.371
1995	2.323
1996	2.277
1997	2.374
1998	2.36
1999	2.443
2000	2.509
2001	2.496
2002	2.525
2003	2.571
2004	2.56
2005	2.172
2006	1.841
2007	1.56
2008	1.493
2009	1.421
2010	1.393
2011	1.449
2012	1.513
2013	1.594
2014	1.647
2015	1.692
2016	1.738
2017	1.674
2018	1.61
2019	1.545
2020	1.481
2021	1.417
2022	1.352
2023	1.288
2024	1.223
2025	1.159
2026	1.095
2027	1.03
2028	0.966
2029	0.902
2030	0.837