Year	Percent
1990	45.039
1991	45.439
1992	46.836
1993	48.236
1994	49.651
1995	52
1996	54.637
1997	57.312
1998	58.057
1999	61.092
2000	57.15
2001	62.227
2002	64.104
2003	65.944
2004	67.746
2005	69.51
2006	71.24
2007	72.92
2008	72.978
2009	73.467
2010	75.029
2011	74.42
2012	74.207
2013	73.86
2014	72.68
2015	71.04
2016	71.571
2017	72.152
2018	72.723
2019	73.286
2020	73.843
2021	74.393
2022	74.938
2023	75.478
2024	76.012
2025	76.54
2026	77.065
2027	77.586
2028	78.106
2029	78.629
2030	79.159