Year	%
1988	5.118517
1989	0.3666773
1990	11.00549
1991	4.684875
1992	0.0070187
1993	0.1910665
1994	0.0019194
1995	0.0291622
1996	7.91572
1997	0.1984451
1998	0.2686623
1999	19.59566
2000	2.768613
2001	0.9591234
2002	0.4149193
2003	0.2466658
2004	0.6519358
2005	0.2441146
2006	0.2605649
2007	0.5814317
2008	0.4735019
2009	0.5203105
2010	0.3717625
2011	0.4704677
2012	0.3462405
2013	0.3934929
2014	0.0904828
2015	0.7490575
2016	0.6554046
2017	0.371169