Year	Percent
1990	8.788
1991	9.211
1992	10.227
1993	10.332
1994	14.843
1995	14.999
1996	15.938
1997	15.609
1998	16.743
1999	17.329
2000	16.917
2001	15.864
2002	14.644
2003	13.68
2004	12.7
2005	11.291
2006	10.02
2007	8.878
2008	7.854
2009	6.94
2010	6.125
2011	5.4
2012	5.1
2013	5.6
2014	6.81
2015	8.76
2016	8.99
2017	8.487
2018	7.983
2019	7.48
2020	6.977
2021	6.474
2022	5.97
2023	5.467
2024	4.964
2025	4.46
2026	3.957
2027	3.454
2028	2.95
2029	2.447
2030	1.944