Table of Contents The underfunded status of the Company's defined benefit pension plans recognized in the Consolidated Balance Sheets at December 31 consisted of: A fixed number of U.S. employees, retirees, and eligible dependents were previously covered under a frozen post-retirement medical benefits plan and are now provided Company-subsidized premiums for participation in health care exchanges. The liabilities for this plan are included in the Company's self-insured risks liabilities and are not material. This plan was frozen effective December 31, 2002. The following tables set forth the 2018 and 2017 changes in accumulated other comprehensive loss for the Company's defined benefit retirement plans and post-retirement medical benefits plan on a combined basis: Unrecognized losses reflect changes in the discount rates and differences between expected and actual asset returns, which are being amortized over future periods. These unrecognized losses may be recovered in future periods through actuarial gains. However, unless the minimum amount required to be amortized is below a corridor amount equal to 10.0% of the greater of the projected benefit obligation or the market-related value of plan assets, these unrecognized actuarial losses are required to be amortized and recognized in future periods. Net unrecognized actuarial losses included in accumulated other comprehensive loss and expected to be recognized in net periodic benefit costs during the year ending December 31, 2019 for the U.S. and U.K. defined benefit pension plans are $10,880,000 ($8,122,000 net of tax). 87 Defined Benefit Pension Plans Post-Retirement Medical Benefits Plan (In thousands) Net unrecognized actuarial (loss) gain, December 31, 2016 $ (280,030 ) $ 608 Amortization of net loss (gain) 11,727 (152) Net gain arising during the year 3,537 — Currency translation (3,749) — Net unrecognized actuarial (loss) gain, December 31, 2017 (268,515 ) 456 Amortization of net loss (gain) 10,914 (152) Net loss arising during the year (24,709 ) — Currency translation 1,362 — Net unrecognized actuarial (loss) gain, December 31, 2018 $ (280,948 ) $ 304 December 31, 2018 2017 (In thousands) U.S. Qualified Plan $ 72,484 $ 85,834 Other international plans 1,839 1,201 Subtotal, included in "Accrued pension liabilities" 74,323 87,035 U.K. prepaid pension asset included in "Other noncurrent assets" (32,732) (34,698) Unfunded status of nonqualified defined benefit deferred pension plans included in "Other accrued liabilities" 312 319 Unfunded status of nonqualified defined benefit pension plans included in "Other noncurrent liabilities" 2,891 3,189 Total unfunded status $ 44,794 $ 55,845 Accumulated other comprehensive loss, before income taxes $ (280,644) $ (268,059)