Original sentence: Specially classes with just a few countries are asking for an increse of the numer of competitors.The mayor concern, based upon the 2008 experiance, is the high ratio of no shows and extreme late cancellations of competitors
Edited sentence: Specially classes with just a few countries are asking for an increase of the numer of competitors.The mayor concern, based upon the 2008 experience, is the high ratio of no shows and extreme late cancellations of competitors