Year	% of total
1990	4.600957311712415
1991	4.768413059984814
1992	1.7019294014470512
1993	0.9320987654320987
1994	0.7345679012345679
1995	0.7193409908342034
1996	1.1890235250716534
1997	1.513816579895875
1998	0.8252221752010156
1999	1.1134390900927866
2000	0.922671353251318
2001	0.9137489325362939
2002	0.7073588134626355
2003	0.7577899677656507
2004	0.3900652762298997
2005	1.872566759883753
2006	0.890874701899619
2007	1.384404924760602
2008	0.4669979093698243
2009	0.2730719266152337
2010	0.2966090372230981
2011	0.18672417420576476
2012	0.18523126261369605
2013	0.02549264537181023
2014	0.029898941577468155
2015	0.07447798909429446