pre_text: table of contents item 2 . properties . the following table summarizes the facilities we lease as of december 31 , 2017 , including the location and size of each principal facility , and their designated use . we believe our facilities are adequate for our current and near-term needs , and will be able to locate additional facilities as needed . location approximate square feet operation expiration dates .
post_text: ________________ *excludes approximately 309000 square feet for which the leases do not commence until 2018 and beyond . item 3 . legal proceedings . we are involved in various lawsuits and claims arising in the ordinary course of business , including actions with respect to intellectual property , employment , and contractual matters . in connection with these matters , we assess , on a regular basis , the probability and range of possible loss based on the developments in these matters . a liability is recorded in the financial statements if it is believed to be probable that a loss has been incurred and the amount of the loss can be reasonably estimated . because litigation is inherently unpredictable and unfavorable results could occur , assessing contingencies is highly subjective and requires judgments about future events . we regularly review outstanding legal matters to determine the adequacy of the liabilities accrued and related disclosures . the amount of ultimate loss may differ from these estimates . each matter presents its own unique circumstances , and prior litigation does not necessarily provide a reliable basis on which to predict the outcome , or range of outcomes , in any individual proceeding . because of the uncertainties related to the occurrence , amount , and range of loss on any pending litigation or claim , we are currently unable to predict their ultimate outcome , and , with respect to any pending litigation or claim where no liability has been accrued , to make a meaningful estimate of the reasonably possible loss or range of loss that could result from an unfavorable outcome . in the event opposing litigants in outstanding litigations or claims ultimately succeed at trial and any subsequent appeals on their claims , any potential loss or charges in excess of any established accruals , individually or in the aggregate , could have a material adverse effect on our business , financial condition , results of operations , and/or cash flows in the period in which the unfavorable outcome occurs or becomes probable , and potentially in future periods . item 4 . mine safety disclosures . not applicable. .
table: Location Approximate Square Feet Operation LeaseExpiration Dates
table: San Diego, CA 1,218,000 R&D, Manufacturing, Warehouse, Distribution, and Administrative 2018 – 2031
table: San Francisco Bay Area, CA 616,000 R&D, Manufacturing, Warehouse, and Administrative 2018 – 2025
table: Singapore 395,000 R&D, Manufacturing, Warehouse, Distribution, and Administrative 2018 – 2025
table: Cambridge, United Kingdom* 92,000 R&D, Manufacturing, and Administrative 2020 – 2024
table: Eindhoven, the Netherlands 42,000 Distribution and Administrative 2020
table: Madison, WI* 73,000 R&D, Manufacturing, Warehouse, Distribution, and Administrative 2018 – 2019
table: Other* 78,000 Administrative 2018 – 2022
question: Analyse this data from a financial earnings document. in madison wi what was the ratio of the square feet excluded for which the leases do not commence until 2018 as of december 31 , 2017