Oil is by far the world’s most-traded commodity, with $786.3 billion of crude changing hands in international trade in 2015.
While low commodity prices can hurt any major producer, oil prices can have a particularly detrimental effect on oil-rich economies. This is because, for better or worse, many of these economies hold onto oil as an anchor for achieving growth, filling government coffers, and even fueling social programs.
Source: http://www.visualcapitalist.com/chart-countries-damaged-most-low-oil-prices/
