Year	%
1987	10.6
1990	10.3
1992	11
1994	10.6
1996	11
1998	10.9
2000	11.8
2003	12.2
2006	12.9
2009	12.9
2011	12.9
2013	12.9
2015	13.3
2017	13.3
2020	13
2022	14