58% (2011)

63% (1993)

57% (1989)

52% (2002)

64% (2013)

54% (2002)

62% (1998)

62% (2003)

59% (1993)

64% (2003)

56% (2004)

65% (1987)

56% (1995)

54% (1988)

60% (2006)

30% (1990)

69% (2005)

0% (1970)

63% (1988)

56% (1987)