Year	Percent
1990	8.733
1991	9.326
1992	9.358
1993	9.36
1994	9.87
1995	9.11
1996	8.93
1997	8.6
1998	8.47
1999	7.17
2000	6.91
2001	6.63
2002	6.66
2003	6.57
2004	6.09
2005	6.29
2006	6.66
2007	7.14
2008	7.18
2009	7.49
2010	7.11
2011	6.67
2012	6.77
2013	7.12
2014	7.07
2015	7.92
2016	8.76
2017	8.728
2018	8.696
2019	8.664
2020	8.632
2021	8.6
2022	8.567
2023	8.535
2024	8.503
2025	8.471
2026	8.439
2027	8.407
2028	8.375
2029	8.343
2030	8.311