entergy new orleans , inc . 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 . following is an analysis of the change in net revenue comparing 2007 to 2006 . amount ( in millions ) .

amount ( in millions ): 2006 net revenue: 192.2
fuel recovery: 42.6
volume/weather: 25.6
rider revenue: 8.5
net wholesale revenue: -41.2
other: 3.3
2007 net revenue: 231

the fuel recovery variance is due to the inclusion of grand gulf costs in fuel recoveries effective july 1 , 2006 . in june 2006 , the city council approved the recovery of grand gulf costs through the fuel adjustment clause , without a corresponding change in base rates ( a significant portion of grand gulf costs was previously recovered through base rates ) . the volume/weather variance is due to an increase in electricity usage in the service territory in 2007 compared to the same period in 2006 . the first quarter 2006 was affected by customer losses following hurricane katrina . entergy new orleans estimates that approximately 132000 electric customers and 86000 gas customers have returned and are taking service as of december 31 , 2007 , compared to approximately 95000 electric customers and 65000 gas customers as of december 31 , 2006 . billed retail electricity usage increased a total of 540 gwh compared to the same period in 2006 , an increase of 14% ( 14 % ) . the rider revenue variance is due primarily to a storm reserve rider effective march 2007 as a result of the city council's approval of a settlement agreement in october 2006 . the approved storm reserve has been set to collect $ 75 million over a ten-year period through the rider and the funds will be held in a restricted escrow account . the settlement agreement is discussed in note 2 to the financial statements . the net wholesale revenue variance is due to more energy available for resale in 2006 due to the decrease in retail usage caused by customer losses following hurricane katrina . in addition , 2006 revenue includes the sales into the wholesale market of entergy new orleans' share of the output of grand gulf , pursuant to city council approval of measures proposed by entergy new orleans to address the reduction in entergy new orleans' retail customer usage caused by hurricane katrina and to provide revenue support for the costs of entergy new orleans' share of grand other income statement variances 2008 compared to 2007 other operation and maintenance expenses decreased primarily due to : a provision for storm-related bad debts of $ 11 million recorded in 2007 ; a decrease of $ 6.2 million in legal and professional fees ; a decrease of $ 3.4 million in employee benefit expenses ; and a decrease of $ 1.9 million in gas operations spending due to higher labor and material costs for reliability work in 2007. .

Questions:
what was the change in the total of electric customers between 2006 and 2007?
an what was the total of electric customers in 2006?
how much does that change represent in relation to this 2006 total, in percentage?

Answers:
37000
95000
38.9%