49% (2006)

67% (2002)

37% (2002)

53% (2001)

53% (2004)

51% (2000)

48% (1999)

48% (1998)

48% (2002)

35% (1999)

42% (2001)

44% (1998)

38% (1997)

48% (1997)

55% (2004)

41% (2001)