57% (1988)

57% (1994)

61% (1996)

63% (2000)

65% (2004)

61% (1994)

66% (1998)

82% (2012)

62% (2018)

58% (2003)

53% (1995)

48% (1999)

65% (1997)

55% (1992)

45% (1994)

55% (1984)

63% (2003)

81% (2013)

58% (1996)

65% (1997)