71% (1997)

68% (1991)

65% (1997)

64% (1997)

64% (2020)

64% (1995)

50% (1989)

55% (1990)

42% (2000)

62% (1997)

60% (1997)

57% (2003)

40% (1992)

55% (1999)

53% (2012)

54% (1993)

41% (1992)

46% (1992)

42% (1992)

43% (1998)