{"pre_text": ["kendal vroman , 39 mr .", "vroman has served as our managing director , commodity products , otc services & information products since february 2010 .", "mr .", "vroman previously served as managing director and chief corporate development officer from 2008 to 2010 .", "mr .", "vroman joined us in 2001 and since then has held positions of increasing responsibility , including most recently as managing director , corporate development and managing director , information and technology services .", "scot e .", "warren , 47 mr .", "warren has served as our managing director , equity index products and index services since february 2010 .", "mr .", "warren previously served as our managing director , equity products since joining us in 2007 .", "prior to that , mr .", "warren worked for goldman sachs as its president , manager trading and business analysis team .", "prior to goldman sachs , mr .", "warren managed equity and option execution and clearing businesses for abn amro in chicago and was a senior consultant for arthur andersen & co .", "for financial services firms .", "financial information about geographic areas due to the nature of its business , cme group does not track revenues based upon geographic location .", "we do , however , track trading volume generated outside of traditional u.s .", "trading hours and through our international telecommunication hubs .", "our customers can directly access our exchanges throughout the world .", "the following table shows the percentage of our total trading volume on our globex electronic trading platform generated during non-u.s .", "hours and through our international hubs. ."], "post_text": ["available information our web site is www.cmegroup.com .", "information made available on our web site does not constitute part of this document .", "we make available on our web site our annual reports on form 10-k , quarterly reports on form 10-q , current reports on form 8-k and amendments to those reports as soon as reasonably practicable after we electronically file or furnish such materials to the sec .", "our corporate governance materials , including our corporate governance principles , director conflict of interest policy , board of directors code of ethics , categorical independence standards , employee code of conduct and the charters for all the standing committees of our board , may also be found on our web site .", "copies of these materials are also available to shareholders free of charge upon written request to shareholder relations and member services , attention ms .", "beth hausoul , cme group inc. , 20 south wacker drive , chicago , illinois 60606. ."], "table": [["", "2010", "2009", "2008"], ["trading during non-u.s . hours", "13% ( 13 % )", "9% ( 9 % )", "11% ( 11 % )"], ["trading through telecommunication hubs", "8", "7", "8"]], "table_ori": [["", "2010", "2009", "2008"], ["Trading during non-U.S. hours", "13%", "9%", "11%"], ["Trading through telecommunication hubs", "8", "7", "8"]]}

Question: what was the average percent of trading through telecommunication hubs for 2008-2010 ? \\n
Evidence:
table_2: the trading through telecommunication hubs of 2010 is 8 ; the trading through telecommunication hubs of 2009 is 7 ; the trading through telecommunication hubs of 2008 is 8 ;
Program: table_average(trading through telecommunication hubs, none)
Answer:
str_answer: 7.7
exe_answer: 7.66667