Year	%
1989	14.54
1990	15.09
1993	12.51
1995	10.84
1996	7.73
1997	15.06
1998	5.48
1999	6.05
2000	5.16
2001	4.14
2002	4.38
2003	4.04
2004	4.02
2005	3.97
2006	3.53
2007	2.9
2008	4.38
2009	1.71
2010	2.56
2011	2.62
2012	2.54
2013	2.37
2016	2.64
2017	2.06
2018	2
2019	2
2020	2.04
2021	1.83