51% (2010)

55% (1996)

47% (2010)

68% (2007)

37% (2009)

36% (2009)

17% (1994)

64% (2010)

53% (2007)

60% (1989)

39% (1997)

53% (1994)

52% (1993)

53% (1996)

61% (2006)

47% (2008)

42% (2008)

66% (2007)

51% (2009)

58% (1992)