52% (1993)

40% (1994)

39% (1988)

53% (1996)

42% (2008)

50% (2008)

37% (2009)

48% (2009)

64% (2010)

62% (1993)

51% (2012)

47% (2008)

53% (2007)

10% (1995)

60% (1987)

48% (1996)

47% (1994)

28% (1989)

56% (2007)

64% (1996)