51% (1990)

73% (2018)

60% (2005)

68% (1992)

79% (2009)

45% (2006)

59% (1992)

55% (2003)

71% (2020)

53% (2003)

48% (1999)

38% (2000)

51% (2008)

70% (2008)

38% (2005)

57% (1981)

45% (2000)

64% (1970)

30% (1958)

43% (1999)