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 ) .

Table: 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
Calculation: subtract(2438.4, 2408.8)