Exhibit 99.4

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(unaudited)

	Three Months Ended March 31,						Years Ended December 31,
(Amounts in millions of dollars)	2016			2015			2015			2014		2013			2012		2011
Net income(a)(b)		1,606			2,663			5,087			4,244		11,228			13,648		17,400
Income tax expenses(a)(b)		(48	)		1,482			1,653			8,614		14,767			16,747		19,614
Non-controlling interests		15			(155	)		(301	)		6		293			188		424
Equity in income of affiliates (in excess of)/ less than dividends received		(236	)		(68	)		(311	)		29		(775	)		272		(149	)
Interest expensed		179			210			742			536		656			649		862
Estimate of the interest within rental expense		119			102			477			406		357			334		299
Amortization of capitalized interest		41			41			174			160		135			205		280
Total(a)(b)		1,676			4,275			7,521			13,995		26,661			32,043		38,730
Interest expensed		179			210			742			536		656			649		862
Capitalized interest		118			80			362			341		349			333		245
Estimate of the interest within rental expense		119			102			477			406		357			334		299
Preference security dividend requirements of consolidated subsidiaries		—			—			—			—		—			—		—
Fixed charges		416			392			1,581			1,283		1,362			1,316		1,406
Ratio of earnings to fixed charges(a)(b)		4.03			10.91			4.76			10.91		19.57			24.35		27.55

^(a)  Figures for 2013 have been restated pursuant to the retrospective application of the accounting interpretation IFRIC 21 from January 1, 2014.

^(b)  Figures for 2012 and 2011 have been restated pursuant to the retrospective application of the revised accounting standard IAS 19 from January 1, 2013.