Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


entergy arkansas , inc . management's financial discussion and analysis gross operating revenues and fuel and purchased power expenses gross operating revenues increased primarily due to : an increase of $ 114 million in gross wholesale revenue due to an increase in the average price of energy available for resale sales and an increase in sales to affiliated customers ; an increase of $ 106.1 million in production cost allocation rider revenues which became effective in july 2007 as a result of the system agreement proceedings . as a result of the system agreement proceedings , entergy arkansas also has a corresponding increase in deferred fuel expense for payments to other entergy system companies such that there is no effect on net income . entergy arkansas makes payments over a seven-month period but collections from customers occur over a twelve-month period . the production cost allocation rider is discussed in note 2 to the financial statements and the system agreement proceedings are referenced below under "federal regulation" ; and an increase of $ 58.9 million in fuel cost recovery revenues due to changes in the energy cost recovery rider effective april 2008 and september 2008 , partially offset by decreased usage . the energy cost recovery rider filings are discussed in note 2 to the financial statements . the increase was partially offset by a decrease of $ 14.6 million related to volume/weather , as discussed above . fuel and purchased power expenses increased primarily due to an increase of $ 106.1 million in deferred system agreement payments , as discussed above and an increase in the average market price of purchased power . 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 credits . following is an analysis of the change in net revenue comparing 2007 to 2006 . amount ( in millions ) . <table class='wikitable'><tr><td>1</td><td>-</td><td>amount ( in millions )</td></tr><tr><td>2</td><td>2006 net revenue</td><td>$ 1074.5</td></tr><tr><td>3</td><td>net wholesale revenue</td><td>13.2</td></tr><tr><td>4</td><td>transmission revenue</td><td>11.8</td></tr><tr><td>5</td><td>deferred fuel costs revisions</td><td>8.6</td></tr><tr><td>6</td><td>other</td><td>2.5</td></tr><tr><td>7</td><td>2007 net revenue</td><td>$ 1110.6</td></tr></table> the net wholesale revenue variance is primarily due to lower wholesale revenues in the third quarter 2006 due to an october 2006 ferc order requiring entergy arkansas to make a refund to a coal plant co-owner resulting from a contract dispute , in addition to re-pricing revisions , retroactive to 2003 , of $ 5.9 million of purchased power agreements among entergy system companies as directed by the ferc . the transmission revenue variance is primarily due to higher rates and the addition of new transmission customers in late 2006 . the deferred fuel cost revisions variance is primarily due to the 2006 energy cost recovery true-up , made in the first quarter 2007 , which increased net revenue by $ 6.6 million . gross operating revenue and fuel and purchased power expenses gross operating revenues decreased primarily due to a decrease of $ 173.1 million in fuel cost recovery revenues due to a decrease in the energy cost recovery rider effective april 2007 . the energy cost recovery rider is discussed in note 2 to the financial statements . the decrease was partially offset by production cost allocation rider revenues of $ 124.1 million that became effective in july 2007 as a result of the system agreement proceedings . as .
Question: what was the difference in net revenue between 2006 and 2007?

-36.1