Limitations
This site aims to present the best available information gathered during studies by experts using the most appropriate data and methods. However, the information was compiled from a range of sources, including studies completed by a number of different organisations for different purposes over many years. These studies used different inputs, assumptions and methods and produced different outputs, so the results may not be consistent.
While every effort has been made to ensure that the data are correct, no warranty is made as to its fitness for any particular purpose. In particular, commercial decisions should not be made without more detailed studies.
Please contact the relevant organisation for more information.