78% (2008)

72% (2005)

64% (2010)

62% (2007)

72% (1998)

61% (1991)

55% (2006)

72% (1997)

59% (2009)

30% (2020)

56% (2010)

60% (2003)

56% (2013)

57% (1988)

0% (2001)

0% (1993)

60% (1993)