You have been advised by an agent marketing a development site that you are likely to be the successful bidder at the auction if you are prepared to pay $$3,600,000$ at auction. You have completed your research and believe the development will have the following cash flows:

Year $1,(6,000,000)$

Year $2,(2,500,000)$

Year $3,16,000,000$

Year $4,3,000,000$

Year $1(6,000,000)$

Year $2(2,500,000)$

Year $316,000,000$

Year $43,000,000$

What rate of return are you likely to achieve if you pay $$3,600,000$ for the site?

NOTE: Round your answer to $2$ decimal places in percentage. For example, input $12\mathrm{.}34$ as the answer.