Year	Percent
1990	7.408
1991	7.428
1992	7.459
1993	7.519
1994	7.532
1995	7.583
1996	7.664
1997	7.756
1998	7.83
1999	7.942
2000	7.998
2001	8.116
2002	8.211
2003	8.318
2004	8.411
2005	8.509
2006	8.562
2007	8.601
2008	8.671
2009	8.784
2010	8.837
2011	8.873
2012	8.896
2013	8.909
2014	8.912
2015	8.911
2016	8.938
2017	8.992
2018	9.046
2019	9.1
2020	9.154
2021	9.208
2022	9.261
2023	9.315
2024	9.369
2025	9.423
2026	9.477
2027	9.531
2028	9.584
2029	9.638
2030	9.692