Year	Percent
1990	10.439
1991	10.461
1992	10.418
1993	10.251
1994	9.959
1995	9.739
1996	9.56
1997	11.83
1998	15.53
1999	13.31
2000	10.8
2001	11.87
2002	10.62
2003	9.32
2004	10.79
2005	11.49
2006	11.48
2007	12.01
2008	8.51
2009	10.72
2010	10.44
2011	8.57
2012	6.93
2013	7.19
2014	9.07
2015	5.85
2016	4.39
2017	4.274
2018	4.159
2019	4.043
2020	3.927
2021	3.811
2022	3.696
2023	3.58
2024	3.464
2025	3.348
2026	3.233
2027	3.117
2028	3.001
2029	2.885
2030	2.77