Year	% of total
1990	96.50531093078375
1991	87.4472474253296
1992	90.6059880239521
1993	90.8215364891519
1994	90.27184812623274
1995	89.80531249999999
1996	89.56853991736638
1997	89.44705726965341
1998	87.77695096751076
1999	88.06482048374906
2000	88.7095943877551
2001	90.68044577312739
2002	88.2015994875127
2003	87.47752836090078
2004	85.20460940651463
2005	77.58292941402865
2006	80.80715515773102
2007	85.49104859067702
2008	86.51294385768792
2009	82.83261775940018
2010	92.26171984134469
2011	88.67877628121738
2012	90.1413472454936
2013	95.74151774381141
2014	102.85560038051686
2015	112.94040614726153
2016	92.25553933209459