Before revision: In 2007 , in the United Kingdom, the national average was 15 per 100,000 and the highest incidence rates in Western Europe were 30 per 100,000 in Portugal and Spain .
After revision: In 2017 , in the United Kingdom, the national average was 9 per 100,000 and the highest incidence rates in Western Europe were 20 per 100,000 in Portugal .