Year	%
1989	98.1748
1990	71.51865
1992	94.22398
1993	51.02991
1994	68.26152
1995	92.07347
1996	92.38342
1997	70.20059
1998	60.72659
1999	67.88361
2000	58.5708
2001	58.08017
2002	65.06406
2003	68.42601
2004	68.60913
2005	31.37738
2006	28.03985
2007	26.87103
2008	31.67907
2009	34.74907
2010	28.37127
2011	31.89466
2012	21.7609
2013	22.01701
2014	41.52776
2015	22.65889
2016	25.23267
2017	19.1173