Coffee's popularity has never stopped growing since it's discovery thousands of years ago.
This chart, although it is only showing data from 2000-2012, sums up coffee's popularity since it first was used. With rare and small drops in demand across the world, coffee is one of the most traded products on the planet. Every continent has traded coffee as an import or export since it's discovery because of how vital it is to billions of people every day. As technology progresses, so does the production and sale of this commodity.
This YouTube video will inform you on the Fair Trade aspect of coffee trade around the world. Fair trade ensures the coffee is made under environmentally sound conditions and it is also better quality coffee. Fair Trade coffee brands are generally more expensive because of the better quality and because the cost of environmentally safe technology is higher as well.