56% (2003)

70% (2003)

50% (1997)

44% (2000)

61% (1998)

55% (2000)

48% (1996)

61% (2000)

35% (1996)

40% (1997)

30% (1995)

55% (2000)

42% (1997)

0% (2000)

35% (2001)