74% (1991)

70% (2012)

64% (2003)

68% (1989)

69% (1994)

71% (1995)

59% (2003)

68% (1994)

62% (1998)

53% (2007)

67% (1999)

65% (1996)

44% (1992)

50% (1999)

47% (2014)

70% (1996)

58% (2009)

65% (1992)

59% (1992)

45% (2008)