49% (1991)

57% (1998)

53% (1999)

67% (1997)

67% (2013)

63% (2001)

72% (1996)

67% (1995)

55% (1998)

57% (1999)

47% (1989)

63% (1996)

60% (1991)

65% (1998)

42% (1992)

64% (1990)

50% (1999)

61% (2004)

0% (1970)

51% (2005)