74% (1991)

70% (2012)

69% (1994)

59% (1992)

63% (2003)

73% (2009)

68% (1989)

62% (1998)

44% (1992)

66% (1999)

71% (1995)

70% (1996)

54% (2007)

68% (1994)

65% (1992)

51% (1999)

61% (2002)

55% (1994)

47% (2014)

58% (2009)