I went to the website the OP posted in the question to see what might have been read. I scrolled down a bit and found this story. Maybe the answer to his question is in here......
http://mexiconewsdaily.com/news/index-ranks-mexico-as-2nd-happiest-country/
Index ranks Mexico as 2nd happiest country
Happy Planet Index measures 'sustainable well-being'
http://mexiconewsdaily.com/news/mexico-happy-country-and-a-happy-language/
http://happyplanetindex.org/
http://unsdsn.org/resources/publications/world-happiness-report-2015/
http://worldhappiness.report/
