The municipal solid waste (MSW) generated in a community (population = 100000) is disposed on a 12$\times$12 m\(^2\) landfill site, which can be filled to a total depth of 25 m (including soil cover). Assume that MSW is generated at a rate of 2.5 kg per person per day and its compacted density is 800 kg/m\(^3\). If the volumetric ratio of MSW and soil cover is 5:1, the useful life of the landfill site is _______ years (rounded off to the nearest integer).