61% (2002)

65% (2005)

64% (1999)

73% (2000)

54% (2009)

70% (2001)

60% (2001)

70% (2004)

50% (2006)

55% (2009)

56% (2006)

53% (1993)

60% (2002)

61% (1998)

60% (2001)

60% (2001)

51% (1997)

61% (2003)

54% (1998)

49% (1995)