60% (1993)

57% (1995)

73% (2001)

40% (1994)

45% (1978)

60% (1974)

45% (1972)

55% (1968)

54% (2006)

70% (2012)

30% (2007)

45% (1988)

38% (1994)

0% (1996)

41% (2000)

40% (1989)

67% (2000)

73% (1987)

70% (1999)

35% (1974)