context: During 2006, Chile imported US $26 billion from the Americas, representing 54% of total imports, followed by Asia at 22%, and Europe at 16%. Mercosur members were the main suppliers of imports to Chile at US $9.1 billion, followed by the United States with US $5.5 billion and the European Union with US $5.2 billion. From Asia, China was the most important exporter to Chile, with goods valued at US $3.6 billion. Year-on-year growth in imports was especially strong from a number of countries - Ecuador (123.9%), Thailand (72.1%), Korea (52.6%), and China (36.9%).
question: How many more billions of dollars were imported from Mercosur than the United States?
answer: 3.6