Year	Percent
1990	4.55
1991	3.89
1992	4.15
1993	3.72
1994	3.92
1995	3.71
1996	4.24
1997	3.39
1998	3.52
1999	2.92
2000	2.86
2001	2.78
2002	2.2
2003	2.28
2004	1.91
2005	1.92
2006	1.96
2007	2.09
2008	1.98
2009	2.15
2010	2.11
2011	1.99
2012	1.43
2013	1.39
2014	1.49
2015	2.05
2016	2.27
2017	2.194
2018	2.117
2019	2.041
2020	1.964
2021	1.888
2022	1.812
2023	1.735
2024	1.659
2025	1.582
2026	1.506
2027	1.43
2028	1.353
2029	1.277
2030	1.201