Net Profit Margin Ratio	25.88%	20.91%	21.24%
Total Asset Turnover	104.22%	84.76%	76.86%
Return on Assets	26.97%	17.73%	16.32%
Operating Income Margin	29.85%	24.44%	25.27%
Return on Equity	150.07%	87.87%	61.06%
Return on Common Equity	165.05%	113.06%	122.32%
Gross Profit Margin	41.78%	38.23%	37.82%

1. Assess the significant trends you see for the company's profitability by discussing how the net profit margin affects return on assets, and how the depreciation of assets affects the profitability ratios.