71% (2004)

70% (2001)

72% (2019)

60% (2005)

65% (2006)

61% (2003)

50% (2018)

51% (2004)

53% (2019)

59% (2015)

45% (1987)

49% (2003)

49% (2002)

49% (1976)

57% (2000)

0% (2006)

0% (1938)

80% (2007)