Year	Percent
1990	12.31
1991	13.154
1992	11.581
1993	12.062
1994	12.044
1995	11.899
1996	11.524
1997	7.891
1998	6.954
1999	6.912
2000	6.479
2001	6.638
2002	6.385
2003	6.699
2004	5.83
2005	6.615
2006	6.374
2007	6.92
2008	7.873
2009	8.945
2010	10.147
2011	11.49
2012	11.464
2013	11.438
2014	11.412
2015	11.386
2016	11.56
2017	11.792
2018	12.023
2019	12.255
2020	12.486
2021	12.717
2022	12.949
2023	13.18
2024	13.412
2025	13.643
2026	13.875
2027	14.106
2028	14.338
2029	14.569
2030	14.801