74% (1991)

70% (2012)

64% (2003)

68% (1989)

71% (1995)

62% (1998)

69% (1994)

65% (1996)

50% (1999)

70% (1996)

68% (1994)

53% (2007)

44% (1992)

67% (1999)

47% (2014)

65% (1992)

61% (2002)

58% (2009)

59% (1992)

59% (2003)