56% (2006)

33% (2004)

42% (2003)

67% (1997)

62% (1994)

49% (1998)

50% (2003)

40% (1999)

58% (1996)

54% (1999)

49% (1997)

52% (1996)

36% (2003)

42% (1995)

60% (1994)

44% (2008)

39% (2002)

54% (1997)

44% (1992)

53% (1997)