Year	Percent
1990	10.792
1991	11.049
1992	11.266
1993	11.448
1994	11.601
1995	11.497
1996	11.394
1997	11.291
1998	11.19
1999	11.089
2000	10.989
2001	11.346
2002	11.713
2003	12.09
2004	12.478
2005	12.876
2006	12.539
2007	12.21
2008	11.888
2009	11.573
2010	11.266
2011	10.721
2012	10.2
2013	10.508
2014	10.912
2015	11.457
2016	12.271
2017	12.137
2018	12.003
2019	11.869
2020	11.734
2021	11.6
2022	11.466
2023	11.332
2024	11.197
2025	11.063
2026	10.929
2027	10.795
2028	10.66
2029	10.526
2030	10.392