Steve. The link to the entire report is right there. They did not take those things into account. They explained very clearly the data and input they used. the sources they got them from are all in the appendix.

They did not add the factors I listed into place

It is all explained for you in the report in black and white.

The "aim" as you described it is based on this report, which ( repeating now) did not take the factors I listed into account.

Read it as many times as you need to, to accept that fact.