Year	%
1999	15.35
2001	11.99
2002	11.47
2003	10.61
2004	16.46
2005	12.04
2006	10.83
2007	8.3
2008	8.26
2009	9.74
2010	17.52
2011	12.8
2012	13.9
2013	16.05
2014	19.47
2015	22.43
2016	19.29
2017	21.44
2019	24.86
2020	23.18
2021	19.89