Statistics for World's busiest subway systems

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Annual ridership	Year opened	Answer	% Correct
1,518,600,000	1900	Paris	99%
3,660,000,000	1971	Beijing	97%
1,378,000,000	1890	London	97%
1,756,800,000	1904	New York City	97%
3,336,246,726	various	Tokyo	97%
3,401,000,000	1993	Shanghai	92%
2,378,300,000	1935	Moscow	90%
1,767,100,000	1979	Hong Kong	86%
569,700,000	1919	Madrid	86%
534,500,000	1902	Berlin	85%
3,347,100,000	various	Seoul	83%
1,605,000,000	1969	Mexico City	82%
1,007,900,000	2002	Delhi	79%
870,400,000	1933	Osaka	78%
1,307,800,000	1974	São Paulo	75%
2,800,000,000	1997	Guangzhou	71%
740,400,000	1955	Saint Petersburg	68%
1,314,000,000	1987	Cairo	64%
746,000,000	1996	Taipei	64%
1,008,000,000	1987	Singapore	59%
1,292,200,000	2004	Shenzhen	55%
693,000,000	2005	Chongqing	50%
717,000,000	1999	Tehran	48%
782,000,000	2010	Chengdu	45%
472,600,000	1957	Nagoya	45%
712,000,000	2004	Wuhan	45%
670,100,000	1975	Santiago	43%
484,600,000	1960	Kiev	33%
977,000,000	2005	Nanjing	28%
495,000,000	1983	Caracas	11%