Table

Tax bases, assessed taxes and tax deductions for companies. NOK million
	2016	2017
¹Includes other deductions on the Norwegian continental shelf, such as payments related to cessation of activity on the continental shelf.
Taxable income	419 671	467 898
Net wealth	215 739	225 040
Income tax	104 886	112 907
Wealth tax	324	338
Special tax	33 545	61 494
Tonnage tax	48	55
Tax on ground rent income	5 159	6 332
Tax on natural resources	1 601	1 642
Tax deduction for tax on natural resources	2 349	1 585
Deduction for received dividends	..	..
Tax deduction for tax paid to foreign country	946	937
Tax deduction for expenses on research and development	3 630	3 990
Paid back tax	..	..
Paid exploration expenses¹	14 554	17 151