Horse Racing - Crabbie's Grand National Festival - Aintree Racecourse - 9/4/16Racegoers place bets before racing Action Images via Reuters / Andrew BoyersLivepicEDITORIAL USE ONLY. TPX IMAGES OF THE DAY 

A forensic personnel walks in front of a betting shop after an attack in Sarajevo, November 19, 2015. Two soldiers of the Bosnian army were shot dead late on Wednesday when an attacker opened a fire from an automatic weapon at the betting shop near the army barracks at the periphery of the capital Sarajevo. Witnesses at the scene said the attacker appeared to be a follower of the ultra-conservative Salafi Muslim movement in Bosnia, but Nefic could not confirm the reports. REUTERS/Dado Ruvic 

Forensic personnel are seen in front of a betting shop after attack in Sarajevo, November 19, 2015. Two soldiers of the Bosnian army were shot dead late on Wednesday when an attacker opened a fire from an automatic weapon at the betting shop near the army barracks at the periphery of the capital Sarajevo. Witnesses at the scene said the attacker appeared to be a follower of the ultra-conservative Salafi Muslim movement in Bosnia, but Nefic could not confirm the reports. REUTERS/Dado Ruvic 

Forensic personnel are seen in front of a betting shop after an attack in Sarajevo, November 19, 2015. Two soldiers of the Bosnian army were shot dead late on Wednesday when an attacker opened a fire from an automatic weapon at the betting shop near the army barracks at the periphery of the capital Sarajevo. Witnesses at the scene said the attacker appeared to be a follower of the ultra-conservative Salafi Muslim movement in Bosnia, but Nefic could not confirm the reports. REUTERS/Dado Ruvic 

Two players are seen inside a lottery store, with OPAP games on display, in central Athens May 24, 2011. Greece has pledged to its EU partners to target 50 billion euros ($70 billion) from privatisations and real estate assets, including a 34 percent stake in gaming firm OPAP . REUTERS/Yiorgos Karahalis (GREECE - Tags: POLITICS BUSINESS) 

A man sits inside a lottery store at central Athens May 24, 2011. Greece has pledged to its EU partners to target 50 billion euros ($70 billion) from privatisations and real estate assets, including a 34 percent stake in gaming firm OPAP . REUTERS/Yiorgos Karahalis (GREECE - Tags: POLITICS BUSINESS) 

A betting company board with electoral odds placed on it is seen at a polling station near Witney in Oxfordshire, southern England May 6, 2010. Britons began voting on Thursday in what is forecast to be the closest election since 1992, with the opposition Conservatives struggling to convert their opinion poll advantage into an outright majority. The six latest newspaper polls put the Conservatives between six and nine percentage points ahead of Labour, making them the largest party, but denying them outright control.REUTERS/Toby Melville (BRITAIN - Tags: ELECTIONS POLITICS) 

A man picks numbers for the "SuperEnalotto" state lottery at a betting shop in Milan August 6, 2009. The jackpot for Italy's state lottery increased to a record euro 119 million ($171.2 million) after no-one got the winning, six-number combination in Tuesday's draw. REUTERS/Stefano Rellandini (ITALY SOCIETY) 

A man looks at the an advertisement for the state lottery in the window of a betting shop in Milan August 6, 2009. The jackpot for Italy's state lottery increased to a record euro 119 million ($171.2 million) after no-one got the winning, six-number combination in Tuesday's draw. REUTERS/Stefano Rellandini (ITALY SOCIETY) 

A customer plays roulette at the betting shop Victoria in Madrid October 11, 2008. Besides pawnbrokers, cobblers, betting shops and cheap mobile phone services are doing a good trade as consumers become more thrifty and companies across most of Spain's struggling economy slash jobs and investment. To match feature FINANCIAL/SPAIN-WINNERS REUTERS/Susana Vera (SPAIN) 

A customer places a bet on a soccer match at the betting shop Victoria in Madrid October 11, 2008. Besides pawnbrokers, cobblers, betting shops and cheap mobile phone services are doing a good trade as consumers become more thrifty and companies across most of Spain's struggling economy slash jobs and investment. To match feature FINANCIAL/SPAIN-WINNERS REUTERS/Susana Vera (SPAIN) 

A woman places a bet before the start of the first race of the Epsom Derby Festival at Epsom Downs in Surrey, southern England June 6, 2008. REUTERS/Darren Staples (BRITAIN) 

A man reads a newspaper and watches the screens in Spain's first sports betting shop in Madrid, April 17, 2008. The shop opened for business on Wednesday, one of thousands that foreign bookmakers hope to launch in the football-crazy nation which already bets more than any other European country.REUTERS/Andrea Comas (SPAIN) 

People stand at the counter in Spain's first sports betting shop in Madrid, April 17, 2008. The shop opened for business on Wednesday, one of thousands that foreign bookmakers hope to launch in the football-crazy nation which already bets more than any other European country.REUTERS/Andrea Comas (SPAIN)