Year	Percent
1990	9.947
1991	10.272
1992	10.69
1993	10.921
1994	10.89
1995	11.055
1996	11.222
1997	11.391
1998	11.563
1999	11.736
2000	11.912
2001	12.09
2002	12.271
2003	12.454
2004	12.639
2005	12.827
2006	13.016
2007	13.209
2008	13.403
2009	13.6
2010	13.8
2011	14.278
2012	14.77
2013	11.667
2014	9.145
2015	7.125
2016	15.9
2017	15.621
2018	15.343
2019	15.064
2020	14.786
2021	14.507
2022	14.228
2023	13.95
2024	13.671
2025	13.393
2026	13.114
2027	12.835
2028	12.557
2029	12.278
2030	12