Statistics for Largest Empires by Share of World Population

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Empire	% of world pop.	Year	% Correct
Mongol Empire	31%	1290	90%
Roman Empire	30%	150	87%
British Empire	23%	1938	79%
Achaemenid Empire	12%	450 BC	77%
Qin Dynasty	24%	220 BC	77%
Empire of Japan	20%	1943	71%
Qing Dynasty	37%	1800	57%
Macedonian Empire	15%	323 BC	53%
Ming Dynasty	28%	1600	53%
Western Han Dynasty	32%	1	53%
Mughal Empire	24%	1700	52%
Nazi Germany	12%	1943	48%
Northern Song Dynasty	33%	1100	41%
Tang Dynasty	23%	900	37%
Maurya Empire	19%	250 BC	34%
Gupta Empire	13%	450	26%
Jin Dynasty(1115-1234)	12%	1200	23%
Jin Dynasty(266-420)	28%	280	23%
Delhi Sultanate	23%	1350	21%
Umayyad Caliphate	13%	750	20%
Northern Zhou	16%	580	17%
Kushan Empire	11%	200	9%
Later Zhao	10%	330	9%
Pala Empire	11%	800	8%
Empire of Harsha	15%	647	7%
Former Yan	12%	366	7%
Former Qin	19%	276	6%
Northern Wei	13%	500	6%