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Forbes November 2017: $21 million Forbes October 2016: $19 million Gobankingrates May 2016: $20 million Forbes June 2011: $20 million Forbes May 2010: $16 million

Zdroje

• Picture: Wikipedia
• Text: Forbes
• Text: Wikipedia
• Text: Gobankingrates
• Text: Forbes

Update: 2018-1

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