Berikut ini adalah daftar kepala negara , kepala pemerintahan , dan pemimpin negara lain menurut tahun.
Abad ke-21
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- – – – – – – – 2013 – 2012 – 2011
- 2010 – 2009 – 2008 – 2007 – 2006 – 2005 – 2004 – 2003 – 2002 – 2001
Abad ke-20
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Abad ke-19
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Abad ke-18
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Abad ke-17
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Abad ke-16
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Abad ke-15
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Abad ke-14
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Abad ke-13
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Abad ke-12
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Abad ke-11
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Abad ke-10
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Abad ke-9
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Abad ke-8
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Abad ke-7
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Abad ke-6
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Abad ke-5
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Abad ke-4
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Abad ke-3
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Abad ke-2
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Abad ke-1
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Abad ke-1 SM
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Abad ke-2 SM
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Abad ke-3 SM
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Abad ke-4 SM
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Abad ke-5 SM
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Abad ke-6 SM dan sebelumnya
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