credit facilities as our bermuda subsidiaries are not admitted insurers and reinsurers in the u.s. , the terms of certain u.s .insurance and reinsurance contracts require them to provide collateral , which can be in the form of locs .in addition , ace global markets is required to satisfy certain u.s .regulatory trust fund requirements which can be met by the issuance of locs .locs may also be used for general corporate purposes and to provide underwriting capacity as funds at lloyd 2019s .the following table shows our main credit facilities by credit line , usage , and expiry date at december 31 , 2010 .( in millions of u.s .dollars ) credit line ( 1 ) usage expiry date .
[['( in millions of u.s . dollars )', 'creditline ( 1 )', 'usage', 'expiry date'], ['syndicated letter of credit facility', '$ 1000', '$ 574', 'nov . 2012'], ['revolving credit/loc facility ( 2 )', '500', '370', 'nov . 2012'], ['bilateral letter of credit facility', '500', '500', 'sept . 2014'], ['funds at lloyds 2019s capital facilities ( 3 )', '400', '340', 'dec . 2015'], ['total', '$ 2400', '$ 1784', '']]
( 1 ) certain facilities are guaranteed by operating subsidiaries and/or ace limited .( 2 ) may also be used for locs .( 3 ) supports ace global markets underwriting capacity for lloyd 2019s syndicate 2488 ( see discussion below ) .in november 2010 , we entered into four letter of credit facility agreements which collectively permit the issuance of up to $ 400 million of letters of credit .we expect that most of the locs issued under the loc agreements will be used to support the ongoing funds at lloyd 2019s requirements of syndicate 2488 , but locs may also be used for other general corporate purposes .it is anticipated that our commercial facilities will be renewed on expiry but such renewals are subject to the availability of credit from banks utilized by ace .in the event that such credit support is insufficient , we could be required to provide alter- native security to clients .this could take the form of additional insurance trusts supported by our investment portfolio or funds withheld using our cash resources .the value of letters of credit required is driven by , among other things , statutory liabilities reported by variable annuity guarantee reinsurance clients , loss development of existing reserves , the payment pattern of such reserves , the expansion of business , and loss experience of such business .the facilities in the table above require that we maintain certain covenants , all of which have been met at december 31 , 2010 .these covenants include : ( i ) maintenance of a minimum consolidated net worth in an amount not less than the 201cminimum amount 201d .for the purpose of this calculation , the minimum amount is an amount equal to the sum of the base amount ( currently $ 13.8 billion ) plus 25 percent of consolidated net income for each fiscal quarter , ending after the date on which the current base amount became effective , plus 50 percent of any increase in consolidated net worth during the same period , attributable to the issuance of common and preferred shares .the minimum amount is subject to an annual reset provision .( ii ) maintenance of a maximum debt to total capitalization ratio of not greater than 0.35 to 1 .under this covenant , debt does not include trust preferred securities or mezzanine equity , except where the ratio of the sum of trust preferred securities and mezzanine equity to total capitalization is greater than 15 percent .in this circumstance , the amount greater than 15 percent would be included in the debt to total capitalization ratio .at december 31 , 2010 , ( a ) the minimum consolidated net worth requirement under the covenant described in ( i ) above was $ 14.5 billion and our actual consolidated net worth as calculated under that covenant was $ 21.6 billion and ( b ) our ratio of debt to total capitalization was 0.167 to 1 , which is below the maximum debt to total capitalization ratio of 0.35 to 1 as described in ( ii ) above .our failure to comply with the covenants under any credit facility would , subject to grace periods in the case of certain covenants , result in an event of default .this could require us to repay any outstanding borrowings or to cash collateralize locs under such facility .a failure by ace limited ( or any of its subsidiaries ) to pay an obligation due for an amount exceeding $ 50 million would result in an event of default under all of the facilities described above .ratings ace limited and its subsidiaries are assigned debt and financial strength ( insurance ) ratings from internationally recognized rating agencies , including s&p , a.m .best , moody 2019s investors service , and fitch .the ratings issued on our companies by these agencies are announced publicly and are available directly from the agencies .our internet site , www.acegroup.com .

Question: what is the total credit line utilization rate?
Answer: 74.3%