73% (1991)

70% (2012)

54% (2007)

63% (1998)

68% (1994)

68% (1994)

64% (2003)

70% (1996)

57% (2006)

65% (1992)

71% (1995)

49% (1999)

65% (1996)

47% (2014)

67% (1999)

68% (1989)

59% (2002)

59% (1992)

59% (2003)

59% (2009)