Explain the company's ROA changes using the ROA profit driver analysis.

The Coca-Cola Company's return on assets (ROA), net profit margin for ROA, and total asset turnover for the past two years. :

$ Millions	2015	2014
Total Sales	44,294	45,998
Total Assets	90,093	92,023
Net Profit	7,366	7,124
Return On Assets	8.18%	7.74%
Net Profit Margin	16.63%	15.49%
Total Asset Turnover	0.49	0.50