49% (2006)

68% (2002)

48% (1999)

51% (2000)

53% (2004)

37% (2002)

48% (2002)

53% (2001)

48% (1998)

44% (1998)

42% (2001)

48% (1997)

35% (1999)

38% (1997)

55% (2004)

41% (2001)