The document shows profit margin ratios for years 2019-2021. Gross profit margin decreased from 26.88 in 2019 to -0.21 in 2020 but increased to 24.79 in 2021. Operating profit margin decreased from 23.79 in 2019 to -1.3 in 2020 but increased to 22.45 in 2021. Net profit margin decreased from 15.78 in 2019 to -3.93 in 2020 but increased to 14.53 in 2021.