system energy resources , inc . management's financial discussion and analysis operating activities cash flow from operations increased by $ 232.1 million in 2004 primarily due to income tax refunds of $ 70.6 million in 2004 compared to income tax payments of $ 230.9 million in 2003 . the increase was partially offset by money pool activity , as discussed below . in 2003 , the domestic utility companies and system energy filed , with the irs , a change in tax accounting method notification for their respective calculations of cost of goods sold . the adjustment implemented a simplified method of allocation of overhead to the production of electricity , which is provided under the irs capitalization regulations . the cumulative adjustment placing these companies on the new methodology resulted in a $ 430 million deduction for system energy on entergy's 2003 income tax return . there was no cash benefit from the method change in 2003 . in 2004 system energy realized $ 144 million in cash tax benefit from the method change . this tax accounting method change is an issue across the utility industry and will likely be challenged by the irs on audit . cash flow from operations decreased by $ 124.8 million in 2003 primarily due to the following : 2022 an increase in federal income taxes paid of $ 74.0 million in 2003 compared to 2002 ; 2022 the cessation of the entergy mississippi ggart . system energy collected $ 21.7 million in 2003 and $ 40.8 million in 2002 from entergy mississippi in conjunction with the ggart , which provided for the acceleration of entergy mississippi's grand gulf purchased power obligation . the mpsc authorized cessation of the ggart effective july 1 , 2003 . see note 2 to the domestic utility companies and system energy financial statements for further discussion of the ggart ; and 2022 money pool activity , as discussed below . system energy's receivables from the money pool were as follows as of december 31 for each of the following years: .
what is the money pool activity use of operating cash flows as a percentage of receivables from the money pool in 2004?
money pool activity used $ 42.5 million of system energy's operating cash flows in 2004 , used $ 12.0 million in 2003 , and provided $ 6.8 million in 2002 . see note 4 to the domestic utility companies and system energy financial statements for a description of the money pool . investing activities net cash used for investing activities was practically unchanged in 2004 compared to 2003 primarily because an increase in construction expenditures caused by a reclassification of inventory items to capital was significantly offset by the maturity of $ 6.5 million of other temporary investments that had been made in 2003 , which provided cash in 2004 . the increase of $ 16.2 million in net cash used in investing activities in 2003 was primarily due to the following : 2022 the maturity in 2002 of $ 22.4 million of other temporary investments that had been made in 2001 , which provided cash in 2002 ; 2022 an increase in decommissioning trust contributions and realized change in trust assets of $ 8.2 million in 2003 compared to 2002 ; and 2022 other temporary investments of $ 6.5 million made in 2003 . partially offsetting the increases in net cash used in investing activities was a decrease in construction expenditures of $ 22.1 million in 2003 compared to 2002 primarily due to the power uprate project in 2002. .