Is Buddhism the fastest growing religion in the West

This is a companion question to this one . I've heard it said that Buddhism is the fastest growing religion in the West. Is that true? Does anyone have any statistics to support or refute this? It seems that this wouldn't be right in absolute terms but might be true in percentage growth for some countries. I appreciate that many people find the term 'The West' unsatisfactory. However for this could we use the definition from here : > cultures that are directly derived from and influenced by European > cultures so this include be Europe, North American plus Australia and New Zealand.