68% (1991)

63% (1995)

64% (2020)

65% (1997)

72% (1997)

50% (1989)

53% (2012)

62% (1997)

64% (1997)

51% (1993)

42% (2000)

55% (1990)

60% (1997)

55% (1999)

57% (2003)

38% (1992)

46% (1992)

41% (1992)

50% (1979)

42% (1996)