Year	% of total
1992	4.936787726988102
1993	1.997694029850746
1994	10.211898734177216
1995	8.37860534124629
1996	11.28980906921241
1997	3.325783274440518
1998	2.999033457249071
1999	3.137167300380228
2000	3.2858422939068097
2001	2.185276162790698
2002	1.9392788461538462
2003	2.492375504710633
2004	3.7447206165703273
2005	4.2702587800369685
2006	4.0744444444444445
2007	4.0766013763896245
2008	3.674065510597303
2009	2.1193443419135503
2010	2.199496161228407
2011	2.1934035383319292
2012	2.187509107468124
2013	1.7118260869565218
2014	1.7874037968188816
2015	2.0756603773584903
2016	1.8876678603401968