72% (1997)

59% (2009)

69% (1989)

77% (2001)

75% (1992)

67% (1992)

61% (2008)

74% (1993)

54% (2002)

57% (1991)

58% (1995)

68% (1989)

71% (1989)

70% (2017)

59% (1998)

56% (1994)

64% (1994)

73% (1995)

51% (2004)

56% (1997)