60% (2001)

60% (1997)

48% (1991)

53% (1993)

50% (1991)

52% (1996)

45% (1995)

54% (2002)

67% (2000)

57% (2000)

53% (1998)

58% (1998)

51% (1989)

52% (1999)

54% (1995)

51% (2000)

37% (1995)

50% (1993)

58% (1986)

45% (1991)