. fuel purchase commitments dominion enters into long-term purchase commitments for fuel used in electric generation and natural gas for purposes other than trading . estimated payments under these commitments for the next five years are as follows : 2003 2014$ 599 million ; 2004 2014$ 311 million ; 2005 2014$ 253 million ; 2006 2014$ 205 mil- lion ; 2007 2014$ 89 million ; and years beyond 2007 2014$ 215 mil- lion . these purchase commitments include those required for regulated operations