76% (1991)

71% (1994)

71% (1991)

69% (1999)

71% (1989)

67% (1993)

62% (2008)

70% (1996)

68% (1992)

54% (1994)

59% (1996)

72% (2021)

71% (1995)

64% (2001)

60% (2004)

82% (2012)

55% (2003)