Bar Company is considering an investment in equipment that is expected to generate an after-tax income of $4,000 for each year of its four-year life. The asset has no salvage value. The firm is in the 40% tax bracket. The net book value (NBV) of the investment at the beginning of each year is expected to be as follows:

Year 1	$ 20,000
Year 2	10,000
Year 3	5,500
Year 4	2,750

Calculate this asset's accounting (book) rate of return (ARR) on average investment (which is defined as a simple average of the average book value of the asset for each year of its four-year life). Round the final answer to the nearest whole %.