49% (1993)

49% (2005)

44% (1996)

46% (1996)

52% (1998)

57% (2009)

63% (2021)

53% (2001)

53% (1994)

47% (1998)

56% (2005)

45% (1994)

35% (1996)

55% (2000)

50% (2000)

0% (1970)