Year	%
1988	13.38
1991	12
1993	10.31
1996	6.51
1997	10.2
1998	6.99
1999	7.29
2000	6.28
2001	7.61
2002	2.43
2003	6.62
2004	7.55
2005	2.24
2006	4.17
2007	5.66
2008	5.48
2009	6.21
2010	5.2
2011	3.85
2012	4.04
2013	4.62
2014	2.01
2016	3.52
2020	3.04
2021	3.15