You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Republic_of_the_Congo

Context:
The current administration presides over an uneasy internal peace and faces difficult economic problems of stimulating recovery and reducing poverty, despite record-high oil prices since 2003. Natural gas and diamonds are also recent major Congolese exports, although Congo was excluded from the Kimberley Process in 2004 amid allegations that most of its diamond exports were in fact being smuggled out of the neighboring Democratic Republic of Congo; it was re-admitted to the group in 2007.

Question:
When was the Congo allowed back into the Kimberley Process?

2007