67% (1996)

71% (1998)

75% (2001)

69% (2010)

73% (2000)

69% (2012)

64% (2000)

73% (1999)

65% (2005)

62% (1999)

69% (2006)

67% (1989)

69% (1993)

63% (1987)

75% (1994)

62% (2003)

73% (2014)

71% (2000)

69% (1987)

70% (1987)