For the year ended December 31, 2018, we earned an aggregate of $186.7 million from the Spanish Electricity System, including $127.3 million from the Comisión Nacional de los Mercados y la Competencia (“CMNC”), which represents 16.7% of our 2018 consolidated operating revenues. The role of the CMNC is to collect funds payable, mainly from the tariffs to end user customers, and is responsible for the calculation and the settlement of regulated payments. We believe this concentration risk is mitigated by, among other things, the indirect support of the Spanish government for the CNMC’s obligations and for the regulated rate system more generally. Other than the CMNC in Spain, there is no other single customer from which we generated more than 10% of our revenues for the year ended December 31, 2018. In California, where a portion of our solar generation fleet is located, we generated certain revenues from three public utilities located in the state. These three public utilities, in aggregate, accounted for approximately 13.6% of our consolidated operating revenues for the year ended December 31, 2018.
Item 8. Financial Statements and Supplementary Data.
The financial statements and schedules are listed in Part IV, Item 15. Exhibits, Financial Statement Schedules of this Annual Report on Form 10-K and are incorporated by reference herein. Our selected quarterly financial data for each of the quarterly periods ended March 31, June 30, September 30 and December 31 in 2018 and 2017 are included in Note 22. Quarterly Financial Information (Unaudited) to our consolidated financial statements in this Annual Report on Form 10-K.
Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.
Item 9A. Controls and Procedures.
Evaluation of Disclosure Controls and Procedures
We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in the reports we that file or furnish under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.
In connection with the preparation of this Form 10-K, we carried out an evaluation under the supervision of and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, as of December 31, 2018, of the effectiveness of the design and operation of our disclosure controls and procedures, as such terms are defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Based upon this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that as of December 31, 2018, our disclosure controls and procedures were not effective because of the material weaknesses described below under “Management’s Report on Internal Control Over Financial Reporting.”
During 2018, we continued our efforts to remediate the material weaknesses. To address the material weaknesses described below, we performed additional analyses and other procedures to ensure that our consolidated financial statements were prepared in accordance with U.S. GAAP. Accordingly, our management believes that the consolidated financial statements included in this Annual Report on Form 10-K fairly present, in all material respects, our financial condition, results of operations and cash flows as of the dates, and for the periods presented, in conformity with U.S. GAAP.
Management’s Report on Internal Control Over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. GAAP and includes those policies and procedures that (i) pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of the assets of the Company, (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company, and (iii) provide reasonable assurance regarding prevention or timely detection of any unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial statements.