51% (1991)

70% (1980)

68% (1996)

58% (2014)

60% (1999)

56% (2009)

65% (1985)

64% (1976)

59% (1988)

63% (2006)

62% (1998)

51% (2009)

40% (2003)

59% (1993)

55% (1986)

10% (1993)

51% (1989)

65% (2019)

62% (2012)

62% (1988)