Hi, I have a question. I am doing a financial analsis. Below is consolidated income statement over five year of the company. I have to find the reason for any growth and loss. Net income goes down in 2014. Is this because operating income from continuing operations goes down? Or due to increase of income tax? Also, I want to know why some year income tax increase. Please help me. Thanks.

		2018	2017	2016	2015	2014		2013
Sales		1,731,894	1,459,874	1,393,997	1,463,753	1,007,064		1,256,164
Cost of sales		(296,820)	(270,887)	(305,065)	(337,073)	(285,251)		(342,655)
Gross profit		1,435,074	1,188,987	1,088,932	1,126,680	721,813		913,509
R&D expenses		(690,592)	(548,735)	(509,779)	(580,554)	(433,900)		(435,011)
Marketing expenses		(339,274)	(316,806)	(305,735)	(284,965)	(279,957)		(304,941)
Administrative and IT expenses		(144,649)	(122,538)	(117,296)	(100,051)	(83,269)		(81,360)
Operating income from continuing operations		260,559	200,908	156,122	161,110	(75,313)		92,197
Goodwill depreciation		0	0	0	0	0		0
Other non-current operating income and expenses		(38,242)	(25,094)	(19,334)	(21,717)	(22,627)		(4,293)
Operating income		222,317	175,814	136,788	139,393	(97,940)		87,904
Interest on borrowings		(17,732)	(12,081)	(8,429)	(5,322)	(6,154)		(5,032)
Income from cash		1,823	1,265	989	556	369		403
Net borrowing cost		(15,909)	(10,816)	(7,440)	(4,766)	(5,785)		(4,629)
Result from foreign-exchange operations		(5,747)	(2,288)	(5,168)	1,159	(1,143)		709
Other financial expenses		(56)	(5,449)	(3,666)	(1,764)	(114)		(219)
Other financial income		8,312	2,348	2,548	6,083	17,376		8,138
Net financial income		(13,400)	(16,205)	(13,726)	712	10,334		3,999
Share in profit of associates		(224)	(339)		0	0		11
Total income tax		(69,241)	(51,457)	(29,654)	(53,094)	22,081		(27,083)
Income for the period		139,452	107,813	93,408	87,011	(65,525)		64,831