{"pre_text": ["entergy louisiana , llc management's financial discussion and analysis 2007 compared to 2006 net revenue consists of operating revenues net of : 1 ) fuel , fuel-related expenses , and gas purchased for resale , 2 ) purchased power expenses , and 3 ) other regulatory charges ( credits ) .", "following is an analysis of the change in net revenue comparing 2007 to 2006 .", "amount ( in millions ) ."], "post_text": ["the base revenues variance is primarily due to increases effective september 2006 for the 2005 formula rate plan filing to recover lpsc-approved incremental deferred and ongoing capacity costs .", "see \"state and local rate regulation\" below and note 2 to the financial statements for a discussion of the formula rate plan filing .", "the volume/weather variance is due to increased electricity usage , including electricity sales during the unbilled service period .", "billed retail electricity usage increased a total of 666 gwh in all sectors compared to 2006 .", "see \"critical accounting estimates\" below and note 1 to the financial statements for further discussion of the accounting for unbilled revenues .", "the transmission revenue variance is primarily due to higher rates .", "the purchased power capacity variance is primarily due to higher purchased power capacity charges and the amortization of capacity charges effective september 2006 as a result of the formula rate plan filing in may 2006 .", "a portion of the purchased power capacity costs is offset in base revenues due to a base rate increase implemented to recover incremental deferred and ongoing purchased power capacity charges , as mentioned above .", "see \"state and local rate regulation\" below and note 2 to the financial statements for a discussion of the formula rate plan filing .", "gross operating revenues , fuel , purchased power expenses , and other regulatory charges ( credits ) gross operating revenues increased primarily due to : an increase of $ 143.1 million in fuel cost recovery revenues due to higher fuel rates and usage ; an increase of $ 78.4 million in base revenues , as discussed above ; and an increase of $ 37.5 million related to volume/weather , as discussed above .", "fuel and purchased power expenses increased primarily due to an increase in net area demand and an increase in deferred fuel expense as a result of higher fuel rates , as discussed above .", "other regulatory credits decreased primarily due to the deferral of capacity charges in 2006 in addition to the amortization of these capacity charges in 2007 as a result of the may 2006 formula rate plan filing ( for the 2005 test year ) with the lpsc to recover such costs through base rates effective september 2006 .", "see note 2 to the financial statements for a discussion of the formula rate plan and storm cost recovery filings with the lpsc. ."], "table": [["", "amount ( in millions )"], ["2006 net revenue", "$ 942.1"], ["base revenues", "78.4"], ["volume/weather", "37.5"], ["transmission revenue", "9.2"], ["purchased power capacity", "-80.0 ( 80.0 )"], ["other", "3.9"], ["2007 net revenue", "$ 991.1"]], "table_ori": [["", "Amount (In Millions)"], ["2006 net revenue", "$942.1"], ["Base revenues", "78.4"], ["Volume/weather", "37.5"], ["Transmission revenue", "9.2"], ["Purchased power capacity", "(80.0)"], ["Other", "3.9"], ["2007 net revenue", "$991.1"]]}

Question: what is the net change in net revenue during 2007?
Evidence:
table_1: the 2006 net revenue of amount ( in millions ) is $ 942.1 ;
table_7: the 2007 net revenue of amount ( in millions ) is $ 991.1 ;
Program: subtract(991.1, 942.1)
Answer:
str_answer: 49
exe_answer: 49