Year	Percent
1990	8.77
1991	8.54
1992	8.93
1993	7.48
1994	7.64
1995	8.2
1996	7.6
1997	7.65
1998	7.69
1999	7.95
2000	7.82
2001	7.18
2002	7.83
2003	8.86
2004	8.78
2005	9.14
2006	9.83
2007	10.03
2008	10.78
2009	10.67
2010	11.68
2011	11.93
2012	12.51
2013	13.23
2014	13.56
2015	14.21
2016	14.23
2017	14.45
2018	14.67
2019	14.889
2020	15.109
2021	15.329
2022	15.549
2023	15.768
2024	15.988
2025	16.208
2026	16.428
2027	16.647
2028	16.867
2029	17.087
2030	17.307