Year	Percent
1990	1.875
1991	1.887
1992	1.879
1993	1.89
1994	1.62
1995	2.08
1996	2.073
1997	2.067
1998	2.06
1999	2.3
2000	2.295
2001	2.29
2002	1.44
2003	1.349
2004	1.264
2005	1.185
2006	1.11
2007	3.34
2008	2.948
2009	2.6
2010	3.2
2011	2.1
2012	2.4
2013	2.6
2014	2.281
2015	2
2016	1.948
2017	2.053
2018	2.157
2019	2.261
2020	2.365
2021	2.47
2022	2.574
2023	2.678
2024	2.782
2025	2.887
2026	2.991
2027	3.095
2028	3.199
2029	3.304
2030	3.408