79% (1993)

76% (2019)

73% (1991)

67% (2000)

63% (2004)

67% (2002)

66% (1999)

57% (2010)

56% (2020)

64% (2006)

59% (2002)

70% (1997)

60% (2001)

68% (1996)

55% (2008)

67% (2017)

56% (2002)

42% (2000)

61% (1999)

64% (2004)