73% (1991)

70% (2012)

47% (2014)

69% (1994)

70% (1996)

63% (2003)

67% (1999)

71% (1995)

69% (1994)

62% (1998)

49% (1999)

68% (1989)

59% (1992)

54% (2007)

59% (2002)

59% (2003)

66% (1992)

44% (1992)

58% (2009)

57% (2006)