discuss roe decompisition and evaluate the drivers of its performance,what trend can you identify in company's performance and what would be the effect of current crisis on the company's financial statement?

2016 2017 2018 2019 2020 2021 2022

3.85 1.1 0.24 0.4 0.23 1.22 2.56 Profit margin

1.27 1.27 1.35 1.27 1.07 0 0 Asset turnover

2.51 2.54 2.59 3.02 3.08 0 0 Financial leverage

12.25 3.55 0.84 1.54 0.77 3 7.07 Return on common equity

17.27 34.41 56.44 46.2 59.23 - - Effective tax rate