Year	%
1987	56.2
1990	57.2
1992	54.8
1994	56.4
1996	54.9
1998	55.5
2000	52.8
2003	51.5
2006	47.7
2009	47.4
2011	46.9
2013	46.8
2015	45.3
2017	45.3
2020	47
2022	43