73% (1991)

70% (2012)

69% (1994)

71% (1995)

62% (1998)

40% (2011)

68% (1994)

63% (2003)

70% (1996)

68% (1989)

59% (1992)

66% (1999)

58% (2009)

47% (2014)

54% (2007)

44% (1992)

51% (1996)

65% (1992)

65% (1996)

55% (1994)