56% (1996)

44% (2004)

45% (2005)

40% (2002)

45% (1995)

51% (2004)

58% (2008)

52% (2000)

60% (1998)

38% (1998)

48% (2000)

40% (1994)

54% (2004)

56% (2009)

49% (2005)

55% (2008)

55% (2007)

40% (2004)

38% (2004)

54% (2005)