segment includes awe and our share of earnings for our investment in ula , which provides expendable launch services to the u.s .government .space systems 2019 operating results included the following ( in millions ) : .
[['', '2016', '2015', '2014'], ['net sales', '$ 9409', '$ 9105', '$ 9202'], ['operating profit', '1289', '1171', '1187'], ['operating margin', '13.7% ( 13.7 % )', '12.9% ( 12.9 % )', '12.9% ( 12.9 % )'], ['backlog atyear-end', '$ 18900', '$ 17400', '$ 20300']]
2016 compared to 2015 space systems 2019 net sales in 2016 increased $ 304 million , or 3% ( 3 % ) , compared to 2015 .the increase was attributable to net sales of approximately $ 410 million from awe following the consolidation of this business in the third quarter of 2016 ; and approximately $ 150 million for commercial space transportation programs due to increased launch-related activities ; and approximately $ 70 million of higher net sales for various programs ( primarily fleet ballistic missiles ) due to increased volume .these increases were partially offset by a decrease in net sales of approximately $ 340 million for government satellite programs due to decreased volume ( primarily sbirs and muos ) and the wind-down or completion of mission solutions programs .space systems 2019 operating profit in 2016 increased $ 118 million , or 10% ( 10 % ) , compared to 2015 .the increase was primarily attributable to a non-cash , pre-tax gain of approximately $ 127 million related to the consolidation of awe ; and approximately $ 80 million of increased equity earnings from joint ventures ( primarily ula ) .these increases were partially offset by a decrease of approximately $ 105 million for government satellite programs due to lower risk retirements ( primarily sbirs , muos and mission solutions programs ) and decreased volume .adjustments not related to volume , including net profit booking rate adjustments , were approximately $ 185 million lower in 2016 compared to 2015 .2015 compared to 2014 space systems 2019 net sales in 2015 decreased $ 97 million , or 1% ( 1 % ) , compared to 2014 .the decrease was attributable to approximately $ 335 million lower net sales for government satellite programs due to decreased volume ( primarily aehf ) and the wind-down or completion of mission solutions programs ; and approximately $ 55 million for strategic missile and defense systems due to lower volume .these decreases were partially offset by higher net sales of approximately $ 235 million for businesses acquired in 2014 ; and approximately $ 75 million for the orion program due to increased volume .space systems 2019 operating profit in 2015 decreased $ 16 million , or 1% ( 1 % ) , compared to 2014 .operating profit increased approximately $ 85 million for government satellite programs due primarily to increased risk retirements .this increase was offset by lower operating profit of approximately $ 65 million for commercial satellite programs due to performance matters on certain programs ; and approximately $ 35 million due to decreased equity earnings in joint ventures .adjustments not related to volume , including net profit booking rate adjustments and other matters , were approximately $ 105 million higher in 2015 compared to 2014 .equity earnings total equity earnings recognized by space systems ( primarily ula ) represented approximately $ 325 million , $ 245 million and $ 280 million , or 25% ( 25 % ) , 21% ( 21 % ) and 24% ( 24 % ) of this business segment 2019s operating profit during 2016 , 2015 and backlog backlog increased in 2016 compared to 2015 primarily due to the addition of awe 2019s backlog .backlog decreased in 2015 compared to 2014 primarily due to lower orders for government satellite programs and the orion program and higher sales on the orion program .trends we expect space systems 2019 2017 net sales to decrease in the mid-single digit percentage range as compared to 2016 , driven by program lifecycles on government satellite programs , partially offset by the recognition of awe net sales for a full year in 2017 versus a partial year in 2016 following the consolidation of awe in the third quarter of 2016 .operating profit .

Question: what is the growth rate for backlog at year-end from 2015 to 2016?
Answer: 8.6%