47% (2004)

36% (2005)

63% (2006)

42% (2000)

60% (2004)

55% (1997)

52% (1998)

59% (1996)

44% (2003)

70% (1995)

68% (1997)

63% (2002)

75% (2000)

50% (2000)

71% (1996)

72% (2003)

53% (1993)

50% (1998)

64% (1993)

52% (1992)