Year	%
1988	0.87
1993	0.8
1995	11.41
1996	9.21
1997	11.35
1998	16.64
1999	11.43
2000	14.7
2001	13.22
2002	12.5
2003	10.88
2004	12.39
2005	13.1
2006	10.3
2007	10.73
2008	10.81
2009	10.75
2010	11.86
2011	12.84
2012	14.39
2013	15.38
2014	12.51
2015	15.86
2016	15.67
2017	15.2
2018	13.21
2019	11.48
2020	12
2021	12.19