I want to know the answer to the following question:
What did Swiss voters agree to join on June 5, 2005?
All the background I'm provided with is that "An application for membership in the European Union was sent in May 1992, but not advanced since the EEA was rejected in December 1992 when Switzerland was the only country to launch a referendum on the EEA.". Is that enough to answer the question?
Answer: no