Year	Percent
1990	5.9
1991	6.4
1992	4.4
1993	3.8
1994	3.2
1995	3
1996	2.6
1997	1.9
1998	1.9
1999	1.797
2000	1.7
2001	1.9
2002	2
2003	1.9
2004	1.9
2005	2
2006	1.8
2007	1.81
2008	1.82
2009	2
2010	1.97
2011	2
2012	2.583
2013	3.33
2014	3.8
2015	4.49
2016	4.82
2017	4.887
2018	4.953
2019	5.02
2020	5.086
2021	5.153
2022	5.219
2023	5.286
2024	5.352
2025	5.419
2026	5.485
2027	5.552
2028	5.618
2029	5.685
2030	5.751