51% (1999)

45% (1996)

57% (1997)

71% (1999)

78% (1999)

20% (1994)

56% (1990)

73% (1995)

70% (1993)

56% (1994)

64% (2000)

30% (1998)

60% (1999)

75% (1994)

46% (1992)

50% (1997)

10% (1999)

47% (1996)

0% (1996)

50% (2001)