Apple has seen strong financial performance over the past three years. The company's total revenue grew 7.2% in 2013 and another 7% in 2014. However, profitability declined slightly over this period as operating expenses increased at a faster rate than revenue. Several key ratios such as debt-to-equity and times interest earned worsened from 2012-2014, indicating higher leverage. While sales of Apple products continue to rise, maintaining profit margins as costs grow remains an ongoing challenge.