65% (2005)

74% (2000)

64% (1999)

70% (2004)

60% (2001)

56% (2009)

60% (2002)

70% (2001)

55% (2009)

46% (1998)

55% (1998)

57% (2006)

50% (1995)

49% (2005)

53% (1993)

61% (2003)

51% (2006)

52% (1997)

60% (2001)

52% (1997)