Year	Percent
1996	85.22601
1997	18.4059
1998	25.41363
1999	33.23648
2000	78.57853
2001	89.24465
2002	18.04328
2003	12.58947
2004	9.08699
2005	14.32937
2006	11.86185
2007	8.21799
2008	10.61711
2009	8.29804
2010	5.87933
2011	9.56104
2012	6.26358
2013	5.43983
2014	2.70811
2015	2.676
2016	2.53455
2017	2.83572