|Year|1st Venue|2nd Venue|3rd Venue|4th Venue|5th Venue|6th Venue|
|---|---|---|---|---|---|---|
|2007|Sheffield|Mexico City|Nanjing|NA|NA|NA|
|2008|Tijuana|Sheffield|Nanjing|NA|NA|NA|
|2009|Doha|Changzhou|Sheffield|Tijuana|NA|NA|
|2010|Qingdao|Veracruz|Veracruz|NA|NA|NA|
|2011|Moscow|Beijing|Sheffield|Guanajuato|NA|NA|
|2012|Dubai|Beijing|Moscow|Tijuana|NA|NA|
|2013|Beijing|Dubai|Edinburgh|Moscow|Guadalajara|Guadalajara|
|2014|Beijing|Dubai|London|Moscow|Windsor|Monterrey|

Question: which is the only year that mexico is on a venue
Answer: 2007