Year	%
1996	1.51
2000	1.73
2001	2.64
2003	3.63
2004	2.94
2005	3.32
2006	2.65
2007	2.62
2008	2.82
2009	3.03
2010	3.34
2011	3.68
2012	4.35
2013	5.21
2014	4.85
2015	5.15
2016	6.23
2020	8.33
2021	7.55