There have been many questions about the countries forecast specially the one focusing on the United States of America (USA). They won't be answered one by one but below you can find some explanation, thoughts and reflections. We are going to keep this as short as possible.

The majority of the economic and demographic data used in the making of the forecasts is widely available by institutions such as the CIA, IMF, UN, USG, etc. You can see the most relevant data at every single country's page. There is a tiny part of data coming from a variety of shadow sources such as Internet gurus, unsigned reports and others. But all these sources are from the internet and are of public domain for at least a minority. For example, several years ago Dagong, the Chinese ratings agency, published a report analyzing the physical economy of the States comparing it with those of China, Germany and Japan. The conclusion was that the US GDP was something between $5 to $10 trillion instead of $15 trillion as officially reported by the USG. We assume that the official data, especially economic, released by governments is fake, cooked or distorted in some degree. Historically it is well known that the former Soviet Union was making up fake statistics years before its collapse. Western as well as other countries are making up their numbers today to conceal their realstate of affairs. We are sure that many people out there can find government statistics in their own countries that by their own personal experience are hard to believe or are so optimistic that may belong to a different country.