entergy mississippi , inc .management's financial discussion and analysis sources of capital entergy mississippi's sources to meet its capital requirements include : internally generated funds ; cash on hand ; debt or preferred stock issuances ; and bank financing under new or existing facilities .entergy mississippi may refinance or redeem debt and preferred stock prior to maturity , to the extent market conditions and interest and dividend rates are favorable .all debt and common and preferred stock issuances by entergy mississippi require prior regulatory approval .preferred stock and debt issuances are also subject to issuance tests set forth in its corporate charter , bond indenture , and other agreements .entergy mississippi has sufficient capacity under these tests to meet its foreseeable capital needs .entergy mississippi has two separate credit facilities in the aggregate amount of $ 50 million and renewed both facilities through may 2009 .borrowings under the credit facilities may be secured by a security interest in entergy mississippi's accounts receivable .no borrowings were outstanding under either credit facility as of december 31 , 2008 .entergy mississippi has obtained short-term borrowing authorization from the ferc under which it may borrow through march 31 , 2010 , up to the aggregate amount , at any one time outstanding , of $ 175 million .see note 4 to the financial statements for further discussion of entergy mississippi's short-term borrowing limits .entergy mississippi has also obtained an order from the ferc authorizing long-term securities issuances .the current long-term authorization extends through june 30 , 2009 .entergy mississippi's receivables from or ( payables to ) the money pool were as follows as of december 31 for each of the following years: .
[['2008', '2007', '2006', '2005'], ['( in thousands )', '( in thousands )', '( in thousands )', '( in thousands )'], ['( $ 66044 )', '$ 20997', '$ 39573', '( $ 84066 )']]
in may 2007 , $ 6.6 million of entergy mississippi's receivable from the money pool was replaced by a note receivable from entergy new orleans .see note 4 to the financial statements for a description of the money pool .state and local rate regulation the rates that entergy mississippi charges for electricity significantly influence its financial position , results of operations , and liquidity .entergy mississippi is regulated and the rates charged to its customers are determined in regulatory proceedings .a governmental agency , the mpsc , is primarily responsible for approval of the rates charged to customers .formula rate plan in march 2008 , entergy mississippi made its annual scheduled formula rate plan filing for the 2007 test year with the mpsc .the filing showed that a $ 10.1 million increase in annual electric revenues is warranted .in june 2008 , entergy mississippi reached a settlement with the mississippi public utilities staff that would result in a $ 3.8 million rate increase .in january 2009 the mpsc rejected the settlement and left the current rates in effect .entergy mississippi appealed the mpsc's decision to the mississippi supreme court. .

Question: how is the cash flow of entergy mississippi affected by the balance in money pool from 2006 to 2007?
Answer: 18576