Year	%
1975	22.81682
1976	22.21331
1999	49.94935
2001	68.59554
2004	64.79817
2005	68.24834
2006	71.24798
2007	80.09695
2008	74.65693
2009	74.32213
2010	54.2194
2012	62.22095