40% (2000)

56% (2001)

32% (2004)

52% (2000)

32% (1996)

45% (1998)

44% (1992)

34% (2004)

60% (2003)

48% (1995)

58% (1998)

36% (2003)

50% (1997)

60% (2004)

52% (1999)

53% (1997)

46% (1994)

38% (2002)

30% (2003)

56% (2006)