Year	Percent
1990	2.42
1991	2.52
1992	2.27
1993	2.16
1994	2.4
1995	2.6
1996	2.68
1997	2.88
1998	3
1999	3.03
2000	3.04
2001	3.16
2002	3.38
2003	3.25
2004	3.5
2005	4.17
2006	4.26
2007	5.02
2008	5.37
2009	5.97
2010	6.82
2011	6.95
2012	7.75
2013	7.95
2014	8.31
2015	8.54
2016	9.02
2017	9.195
2018	9.371
2019	9.546
2020	9.721
2021	9.897
2022	10.072
2023	10.247
2024	10.423
2025	10.598
2026	10.773
2027	10.949
2028	11.124
2029	11.299
2030	11.475