Year	%
1982	32.28733
1984	47.49262
1985	44.66353
1989	54.01811
1991	48.28359
1992	48.59263
1993	51.67088
1994	53.71586
1998	49.81146
1999	60.07772
2001	58.84725
2004	57.13651
2005	58.05713
2006	63.55845
2007	62.21689
2008	57.52667
2009	60.60357
2010	57.29868
2011	55.24641
2012	58.09185
2013	59.05767
2014	60.74079
2015	72.48739