41% (1992)

52% (1996)

50% (2005)

33% (1996)

42% (1998)

48% (2010)

37% (1997)

44% (2002)

43% (2007)

55% (1994)

44% (1995)

30% (2003)

49% (1995)

44% (1994)

39% (2001)

56% (2004)

35% (2004)

25% (1995)

41% (2002)

66% (2005)