Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

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. . <table class='wikitable'><tr><td>1</td><td>-</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>2</td><td>trading during non-u.s . hours</td><td>13% ( 13 % )</td><td>9% ( 9 % )</td><td>11% ( 11 % )</td></tr><tr><td>3</td><td>trading through telecommunication hubs</td><td>8</td><td>7</td><td>8</td></tr></table> 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. .
Question: what was the percentage of trading during non-u.s. hours in 2008?
Answer: 11.0
Question: and the portion that was traded during u.s. hours?
Answer: 89.0
Question: and trading during non-u.s. hours for the next year?
Answer: 9.0
Question: and the portion traded during u.s. hours?
Answer: 91.0
Question: so what was the increase in trading during u.s. hours between the two years?

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