Year	Percent
1998	7.1298
1999	9.5214
2004	8.7387
2005	6.7818
2006	2.7538
2007	1.9729
2009	4.9189
2010	7.4202
2011	1.808
2012	2.8197
2013	4.6023
2014	2.2024
2015	1.1889
2017	5.5839