Financial Ratios Financial Ratio Unit Year ended December 31, 2017 2018 2019 Profitability Ratio1 Gross profit margin2 % 78.67 81.84 82.55 Operating profit margin3 % 59.00 53.37 50.71 Cash flow to income

ended March 31, 2017 2018 2019 2019 2020 Profitability Ratio1 Gross profit margin2 % 78.67 81.84 82.55 90.72 88.15 Operating profit margin3 % 59.00 53.37 50.71 67.77 15.54 Cash flow to income ratio4

December 31, For 3-month period ended March 31, 2017 2018 2019 2019 2020 Profitability Ratio1 Gross profit margin2 % 78.67 81.84 82.55 90.72 88.15 Operating profit margin3 % 59.00 53.37 50.71 67.77 15.54

profit margin2 % 78.67 81.84 82.55 86.06 86.09 Operating profit margin3 % 59.00 53.37 50.71 60.24 10.54 Cash flow to income ratio4 % 85.09 157.27 (19.27) (65.18) (133.23) Net profit margin5 % 59.02 53.35