64% (1990)

57% (1994)

55% (1992)

60% (2007)

55% (1994)

67% (1988)

63% (1990)

60% (2001)

63% (2001)

56% (1996)

62% (2011)

59% (1998)

61% (2005)

60% (2006)

50% (1998)

34% (2009)

60% (1992)

54% (1999)

51% (2002)

62% (1992)