Seven Star Corporation purchased a piece of equipment at the beginning of 2012. The equipment cost $140,000. Its estimated service life is 8 years and has an expected salvage value of $8,000. The sum-of-the-years-digits method is used. The depreciation schedule has a $22,000 annual depreciation expense for a certain year. Question: Determine what year the depreciation expense of $22,000 is on the depreciation schedule. If applicable, round all answers to the nearest whole dollar.