Dr. (PM) Mahathir..., page-175

" The Ore Reserves represent more than 25 years of economic, continuous operations based on the estimated production of 22,000 tonnes per annum REO of finished products.
 The Mineral Resource estimate at the Central Lanthanide Deposit and the Duncan Deposit as at 31 August 2015 are now 23.2 million tonnes, at an average grade of 7.5% REO for a total of 1.73 million tonnes of contained REO.
 The Ore Reserves at the Central Lanthanide Deposit as at 31 August 2015 are now 9.9 million tonnes, at an average grade of 10.8% REO, for a total of 1.08 million tonnes of contained REO."

https://www.lynascorp.com/Shared Do...151005 Ore Reserves and Resources 1481136.pdf

Additional 3ktpa may shave a couple of years but safely decade x 2, as in plural.