totaled $ 12 million , $ 13 million and $ 9 million for 2018 , 2017 and 2016 , respectively . all of the company 2019s contributions are invested in one or more funds at the direction of the employees . note 16 : commitments and contingencies commitments have been made in connection with certain construction programs . the estimated capital expenditures required under legal and binding contractual obligations amounted to $ 419 million as of december 31 , 2018 . the company 2019s regulated subsidiaries maintain agreements with other water purveyors for the purchase of water to supplement their water supply . the following table provides the future annual commitments related to minimum quantities of purchased water having non-cancelable: .
what was the change in the amount of future annual commitments related to minimum quantities of purchased water between \\n2019 and 2020?
the company enters into agreements for the provision of services to water and wastewater facilities for the united states military , municipalities and other customers . see note 3 2014revenue recognition for additional information regarding the company 2019s performance obligations . contingencies the company is routinely involved in legal actions incident to the normal conduct of its business . as of december 31 , 2018 , the company has accrued approximately $ 54 million of probable loss contingencies and has estimated that the maximum amount of losses associated with reasonably possible loss contingencies that can be reasonably estimated is $ 26 million . for certain matters , claims and actions , the company is unable to estimate possible losses . the company believes that damages or settlements , if any , recovered by plaintiffs in such matters , claims or actions , other than as described in this note 16 2014commitments and contingencies , will not have a material adverse effect on the company . west virginia elk river freedom industries chemical spill on june 8 , 2018 , the u.s . district court for the southern district of west virginia granted final approval of a settlement class and global class action settlement ( the 201csettlement 201d ) for all claims and potential claims by all putative class members ( collectively , the 201cplaintiffs 201d ) arising out of the january 2014 freedom industries , inc . chemical spill in west virginia . the effective date of the settlement is july 16 , 2018 . under the terms and conditions of the settlement , west virginia-american water company ( 201cwvawc 201d ) and certain other company affiliated entities ( collectively , the 201camerican water defendants 201d ) did not admit , and will not admit , any fault or liability for any of the allegations made by the plaintiffs in any of the actions that were resolved . under federal class action rules , claimants had the right , until december 8 , 2017 , to elect to opt out of the final settlement . less than 100 of the 225000 estimated putative class members elected to opt out from the settlement , and these claimants will not receive any benefit from or be bound by the terms of the settlement . in june 2018 , the company and its remaining non-participating general liability insurance carrier settled for a payment to the company of $ 20 million , out of a maximum of $ 25 million in potential coverage under the terms of the relevant policy , in exchange for a full release by the american water defendants of all claims against the insurance carrier related to the freedom industries chemical spill. .