73% (2007)

60% (2014)

68% (2001)

56% (2003)

67% (1997)

57% (2005)

59% (2007)

61% (1995)

70% (1993)

67% (2001)

64% (1991)

62% (2002)

68% (2007)

58% (1996)

56% (1992)

57% (2000)

62% (2007)

69% (2000)

62% (1995)

65% (1995)