Year	Percent
1990	1.63
1991	1.54
1992	1.68
1993	1.72
1994	1.49
1995	1.48
1996	1.28
1997	0.96
1998	0.93
1999	1.08
2000	1.01
2001	0.89
2002	0.92
2003	1.02
2004	1.01
2005	1.15
2006	1.13
2007	1.08
2008	1.4
2009	1.43
2010	1.51
2011	1.54
2012	1.58
2013	1.37
2014	1.26
2015	1.43
2016	1.52
2017	1.562
2018	1.604
2019	1.645
2020	1.687
2021	1.729
2022	1.771
2023	1.812
2024	1.854
2025	1.896
2026	1.938
2027	1.979
2028	2.021
2029	2.063
2030	2.105