Our business consists of five reportable segments: U.S. Drilling, Canada Drilling, International Drilling, Drilling Solutions and Rig Technologies. The accounting policies of the segments are the same as those described in Note 2—Summary of Significant Accounting Policies. Inter-segment sales are recorded at cost or cost plus a profit margin. We evaluate the performance of our segments based on several criteria, including adjusted operating income (loss).

The following table sets forth financial information with respect to our reportable operating segments:

(1)	Represents the elimination of inter-segment transactions.

(2)

Adjusted operating income (loss) represents income (loss) from continuing operations before income taxes, interest expense, earnings (losses) from unconsolidated affiliates, investment income (loss), impairments and other charges and other, net. Management evaluates the performance of our operating segments using adjusted operating income (loss), which is a segment performance measure, because it believes that this financial measure reflects our ongoing profitability and performance. In addition, securities analysts and investors use this measure as one of the metrics on which they analyze our performance. A reconciliation to income (loss) from continuing operations before income taxes is provided in the above table.

(3)	Represents the elimination of inter-segment transactions and unallocated corporate expenses, assets and capital expenditures.

The following table sets forth financial information with respect to Nabors’ operations by geographic area based on the location of service provided:


	Year Ended December 31,
	2019		2018		2017
	(In thousands)
Operating revenues
U.S.	$	1,554,442	$	1,347,448	$	973,464
Outside the U.S.		1,488,941		1,710,171		1,590,821
	$	3,043,383	$	3,057,619	$	2,564,285
Property, plant and equipment, net:
U.S.	$	2,470,579	$	2,892,910	$	3,163,425
Outside the U.S.		2,459,970		2,574,960		2,946,140
	$	4,930,549	$	5,467,870	$	6,109,565
Goodwill:
U.S.	$	13,430	$	65,633	$	54,198
Outside the U.S.		14,950		118,281		119,028
	$	28,380	$	183,914	$	173,226

During the years ended December 31, 2019, 2018 and 2017, $696.4 million, $764.5 million and $727.7 million of our consolidated operating revenue was from Saudi Arabia. No other individual country outside of the U.S. was material to our consolidated operating revenue during any of the three periods presented.

One customer accounted for approximately 22%, 24% and 29% of our consolidated operating revenues during the years ended December 31, 2019, 2018 and 2017, respectively, and is included primarily in our International Drilling reportable segment.