Year	% of total
2000	11.604095563139932
2001	13.360323886639677
2002	20.623145400593472
2003	27.389014296463504
2004	34.39943141435678
2005	47.299077733860344
2006	33.116036505867015
2007	25.85209003215434
2008	22.054556006964596
2009	23.218390804597703
2010	29.81438515081207
2011	39.36442849820605
2012	36.76470588235294
2013	40.06410256410257
2014	37.6605504587156
2015	39.946855624446414