I understand where your coming from Jamesc909 but that isn't the point of the article which the Cardiff Airport figures have been compared.
Bristol Airport Express has been running in excess if 10 years which has eventually lead to the position that it's in now.
In the recent report on the purchase of Cardiff Airport the document states that passenger numbers have almost doubled in year two. As passenger numbers continue to grow so will the express bus and there maybe a requirement to eventually increase capacity at peak times.
It will be interesting to know if the works at Cardiff Central Station has reduced demand for the route as there is no longer a bus station. This will be the case for a year at least.