Year	Percent
1990	2.561
1991	2.669
1992	2.789
1993	2.94
1994	2.969
1995	2.991
1996	2.97
1997	2.663
1998	2.388
1999	2.14
2000	2.594
2001	3.142
2002	3.8
2003	3.71
2004	1.8
2005	3.17
2006	1.96
2007	2.14
2008	1.94
2009	2.08
2010	2.11
2011	1.98
2012	2.15
2013	1.89
2014	1.15
2015	2.3
2016	2.15
2017	2.081
2018	2.011
2019	1.942
2020	1.872
2021	1.803
2022	1.733
2023	1.664
2024	1.594
2025	1.525
2026	1.455
2027	1.386
2028	1.317
2029	1.247
2030	1.178