Year	Percent
1990	3.14
1991	3.12
1992	3.08
1993	2.9
1994	2.46
1995	2.32
1996	2.42
1997	2.01
1998	1.98
1999	1.7
2000	1.65
2001	1.5
2002	1.62
2003	1.74
2004	1.52
2005	1.66
2006	1.53
2007	1.94
2008	2.03
2009	1.98
2010	2.27
2011	2.71
2012	3.12
2013	3.1
2014	3.39
2015	3.65
2016	3.9
2017	4.005
2018	4.109
2019	4.214
2020	4.318
2021	4.423
2022	4.528
2023	4.632
2024	4.737
2025	4.841
2026	4.946
2027	5.051
2028	5.155
2029	5.26
2030	5.364