I would like to know the total volume and total amount spent individually for EACH of the following agents sevoflurane, Desflurane, isoflurane, nitrous oxide, and Propofol PER YEAR between 2006 and 2018 as shown below:
1. Total (annual) volume purchased for EACH agent (incl. sevoflurane, Desflurane, isoflurane, nitrous oxide, and Propofol) PER YEAR for 2006-2018 (in millilitres or litres).
2. Total (annual) volume used for EACH agent PER YEAR for 2006-2018 (in millilitres or litres).
3. Total (annual) amount spent on EACH agent PER YEAR for 2006-2108 (in pounds sterling).
If it is easier to provide another unit of measure, please provide details so that I can calculate the volume. Also, please state whether the total amount spent includes or excludes VAT.

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