58% (1989)

60% (1990)

56% (1991)

46% (1989)

63% (1992)

58% (1984)

44% (2012)

49% (1993)

53% (1991)

54% (1992)

45% (2020)

56% (1993)

62% (1996)

52% (1994)

42% (1999)

52% (1993)

45% (1998)

48% (2008)

40% (2005)

50% (1991)