49% (2005)

62% (1995)

44% (2000)

51% (1993)

46% (1998)

49% (2001)

59% (1992)

53% (2001)

42% (1999)

62% (2003)

55% (1999)

47% (1987)

60% (2002)

52% (1997)

61% (1990)

36% (1996)