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:
Kenya

Context:
Sizeable minorities of other faiths do exist (Muslim 11.2%, indigenous beliefs 1.7%), and nonreligious 2.4%. Sixty percent of the Muslim population lives in Kenya's Coastal Region, comprising 50% of the total population there. Roughly 4% of Muslims are Ahmadiyya, 8% Shia and another 8% are non-denominational Muslims, while 73% are Sunni. Western areas of the Coast Region are mostly Christian. The upper part of Kenya's Eastern Region is home to 10% of the country's Muslims, where they constitute the majority religious group. In addition, there is a large Hindu population in Kenya (around 300,000), who have played a key role in the local economy; they are mostly of Indian origin.

Question:
What religion is the western region mostly?

mostly Christian