52% (2002)

45% (2001)

60% (1999)

66% (1997)

68% (1997)

46% (2003)

71% (1996)

64% (1998)

67% (2003)

66% (2001)

59% (2002)

70% (2002)

68% (1994)

75% (2001)

54% (2000)

59% (2006)

64% (2004)

54% (1998)

67% (1997)

61% (2004)