65% (2018)

62% (2012)

70% (2015)

54% (1984)

78% (2008)

63% (1997)

62% (1998)

65% (1996)

53% (2000)

63% (1976)

61% (2003)

64% (1989)

75% (2010)

68% (2001)

55% (1990)

53% (1990)

70% (1993)

48% (1997)

70% (1990)

58% (1992)