Year	%
1999	0.52
2000	0.79
2001	0.57
2002	0.75
2003	0.63
2004	0.82
2005	0.94
2006	0.92
2007	1.42
2008	1.96
2009	2.19
2010	1.95
2011	2.05
2012	2.1
2013	2.27
2014	2.05
2015	2.16
2018	3.85
2019	4.64