Year	%
1990	10.37
1993	11.93
1995	6.19
1996	5.97
1997	5.16
1998	4.84
1999	4.66
2000	5.28
2001	5.01
2002	5.01
2003	4.87
2004	4.95
2005	5.01
2006	4.92
2007	4.77
2008	4.97
2009	5.13
2010	5.03
2011	5.47
2012	5.47
2013	5.5
2014	5.53
2015	5.5
2016	5.38
2017	5.24
2018	5.04
2019	4.9
2020	4.72
2021	4.55