Entertainers United plans 3 annual colossal concerts, each in a different nations capital. The concerts will raise funds for an endowment, which would provide the Worldwide Hunger Relief Fund with $15 million per year into perpetuity. The endowment will be fully funded after 3 years. The rate of interest is expected to be 6% p.a. in all future periods. How much must Entertainers United earn and deposit each year (in $ millions, rounded to one decimal place, e.g., 45.6)) to accumulate the required amount to permanently fund this opportunity?