Considering Amazon's Return on Invested Capital (ROIC) below, please provide a overview of the company's strengths and weaknesses (if any), reasons for the strength/weakness (if any), and reccomendations.

2015

Return on Invested Capital = (Net Income Dividend) / Invested Capital (65,444 - 33,899) / 233 = 7.08%

2016

Return on Invested Capital = (Net Income Dividend) / Invested Capital (83,402 43,816) / 4186 = 10.57%