| Key financial ratios | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 |
Return on sales net profit (loss) / sales revenue | 28.4% | 32.1% | -11.9% | 28.6% | 29.0% | 31.9% | 30.2% | 31.8% | 28.2% | 26.0% | 23.7% | -21.9% | -303.6% |
Current ratio current assets 1 / current liabilities 2 | 7.8 | 12.4 | 3.9 | 4.4 | 4.3 | 4.6 | 5.6 | 2.8 | 4.1 | 5.6 | 2.4 | 4.2 | 11.9 |
Debt ratio total liabilities / total assets | 33.5% | 27.8% | 36.3% | 22.2% | 22.0% | 23.0% | 17.1% | 32.5% | 21.3% | 15.7% | 35.5% | 17.7% | 6.3% |
Return on assets net profit (loss) / total assets | 19.9% | 22.9% | -15.5% | 50.7% | 47.7% | 49.0% | 54.1% | 48.1% | 37.7% | 42.8% | 35.3% | -13.3% | -36.2% |
1) Current assets are decreased by receivables due over 12 months
2) Current liabilities = short-term liabilities + accruals