pre_text: Accumulated Other Comprehensive Income The following table sets forth the amounts reclassified from AOCI into the Consolidated Statements of Operations, and the associated financial statement line item, net of tax, for the periods indicated (in thousands): (1) Amounts are included in the computation of net periodic benefit pension cost. Refer to Note 9 – “Postretirement and Other Employee Benefits” for additional information. (2) The portions of AOCI reclassified into earnings during the fiscal years ended August 31, 2019 and 2017 for available for sale securities were due to a restructuring of securities loss and an other than temporary impairments on securities, respectively, and were recorded to restructuring of securities loss and other expense, respectively. (3) The Company expects to reclassify $17.0 million into earnings during the next twelve months, which will primarily be classified as a component of cost of revenue. (4) Amounts are net of tax, which are immaterial for the fiscal years ended August 31, 2019 and 2017. The amount for the fiscal year ended August 31, 2018 includes a reduction to income tax expense related to derivative instruments of $14.8 million.
table: Fiscal Year Ended August 31,
table: Comprehensive Income Components Financial Statement Line Item 2019 2018 2017
table: Foreign currency translation adjustment Operating income $— $— $5,947
table: Realized losses (gains) on derivative instruments:(3)
table: Foreign exchange contracts Cost of revenue 21,982 (9,379) 4,799
table: Interest rate contracts Interest expense (1,723) (13,697) 3,950
table: Actuarial loss (1) 741 1,127 1,929
table: Prior service credit (1) (44) (88) (138)
table: Available for sale securities (2) 33,333 — 10,139
table: Total amounts reclassified from AOCI(4) $54,289 $(22,037) $26,626
question: Analyse this data from a financial earnings document. What was the change in the Interest rate contracts between 2018 and 2019?