the retail electric price variance is primarily due to an increase in formula rate plan revenues , implemented with the first billing cycle of march 2016 , to collect the estimated first-year revenue requirement related to the purchase of power blocks 3 and 4 of the union power station in march 2016 and a provision recorded in 2016 related to the settlement of the waterford 3 replacement steam generator prudence review proceeding .see note 2 to the financial statements for further discussion of the formula rate plan revenues and the waterford 3 replacement steam generator prudence review proceeding .the louisiana act 55 financing savings obligation variance results from a regulatory charge recorded in 2016 for tax savings to be shared with customers per an agreement approved by the lpsc .the tax savings resulted from the 2010-2011 irs audit settlement on the treatment of the louisiana act 55 financing of storm costs for hurricane gustav and hurricane ike .see note 3 to the financial statements for additional discussion of the settlement and benefit sharing .the volume/weather variance is primarily due to the effect of less favorable weather on residential and commercial sales and decreased usage during the unbilled sales period .the decrease was partially offset by an increase of 1237 gwh , or 4% ( 4 % ) , in industrial usage primarily due to an increase in demand from existing customers and expansion projects in the chemicals industry .2016 compared to 2015 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 2016 to 2015 .amount ( in millions ) .
[['', 'amount ( in millions )'], ['2015 net revenue', '$ 2408.8'], ['retail electric price', '62.5'], ['volume/weather', '-6.7 ( 6.7 )'], ['louisiana act 55 financing savings obligation', '-17.2 ( 17.2 )'], ['other', '-9.0 ( 9.0 )'], ['2016 net revenue', '$ 2438.4']]
the retail electric price variance is primarily due to an increase in formula rate plan revenues , implemented with the first billing cycle of march 2016 , to collect the estimated first-year revenue requirement related to the purchase of power blocks 3 and 4 of the union power station .see note 2 to the financial statements for further discussion .the volume/weather variance is primarily due to the effect of less favorable weather on residential sales , partially offset by an increase in industrial usage and an increase in volume during the unbilled period .the increase in industrial usage is primarily due to increased demand from new customers and expansion projects , primarily in the chemicals industry .the louisiana act 55 financing savings obligation variance results from a regulatory charge for tax savings to be shared with customers per an agreement approved by the lpsc .the tax savings resulted from the 2010-2011 irs audit settlement on the treatment of the louisiana act 55 financing of storm costs for hurricane gustav and hurricane ike .see note 3 to the financial statements for additional discussion of the settlement and benefit sharing .included in other is a provision of $ 23 million recorded in 2016 related to the settlement of the waterford 3 replacement steam generator prudence review proceeding , offset by a provision of $ 32 million recorded in 2015 related to the uncertainty at that time associated with the resolution of the waterford 3 replacement steam generator prudence entergy louisiana , llc and subsidiaries management 2019s financial discussion and analysis .

Question: how much higher was the net revenue in 2016 than 2015 ? ( in millions )
Answer: 29