pre_text: entergy arkansas , inc . and subsidiaries management 2019s financial discussion and analysis plan to spin off the utility 2019s transmission business see the 201cplan to spin off the utility 2019s transmission business 201d section of entergy corporation and subsidiaries management 2019s financial discussion and analysis for a discussion of this matter , including the planned retirement of debt and preferred securities . results of operations net income 2011 compared to 2010 net income decreased $ 7.7 million primarily due to a higher effective income tax rate , lower other income , and higher other operation and maintenance expenses , substantially offset by higher net revenue , lower depreciation and amortization expenses , and lower interest expense . 2010 compared to 2009 net income increased $ 105.7 million primarily due to higher net revenue , a lower effective income tax rate , higher other income , and lower depreciation and amortization expenses , partially offset by higher other operation and maintenance expenses . net revenue 2011 compared to 2010 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 2011 to 2010 . amount ( in millions ) .
post_text: the retail electric price variance is primarily due to a base rate increase effective july 2010 . see note 2 to the financial statements for more discussion of the rate case settlement . the ano decommissioning trust variance is primarily related to the deferral of investment gains from the ano 1 and 2 decommissioning trust in 2010 in accordance with regulatory treatment . the gains resulted in an increase in 2010 in interest and investment income and a corresponding increase in regulatory charges with no effect on net income. .
table: Amount (In Millions)
table: 2010 net revenue $1,216.7
table: Retail electric price 31.0
table: ANO decommissioning trust 26.4
table: Transmission revenue 13.1
table: Volume/weather (15.9)
table: Net wholesale revenue (11.9)
table: Capacity acquisition recovery (10.3)
table: Other 3.2
table: 2011 net revenue $1,252.3
question: Analyse this data from a financial earnings document. from the increase in net revenue , what percentage is attributed to the change in retail electric price?