Year	Percent
1990	3.019
1991	3.053
1992	3.065
1993	2.996
1994	3.05
1995	3.07
1996	3.075
1997	3.123
1998	3.114
1999	3.072
2000	3.04
2001	3.089
2002	3.135
2003	3.2
2004	3.301
2005	3.34
2006	3.362
2007	3.392
2008	3.405
2009	3.404
2010	3.436
2011	3.481
2012	3.501
2013	3.523
2014	3.535
2015	3.522
2016	3.375
2017	3.41
2018	3.445
2019	3.48
2020	3.515
2021	3.55
2022	3.585
2023	3.62
2024	3.655
2025	3.69
2026	3.725
2027	3.759
2028	3.794
2029	3.829
2030	3.864