59% (2005)

55% (2014)

55% (1999)

64% (1998)

71% (1997)

60% (2018)

56% (1998)

70% (2001)

49% (1967)

52% (1999)

58% (2015)

55% (2009)

56% (2000)

59% (2003)

65% (1993)

60% (2018)

40% (1997)

47% (1993)

64% (1994)

60% (1991)