pipeline transportation 2013 we own a system of pipelines through marathon pipe line llc ( 201cmpl 201d ) and ohio river pipe line llc ( 201corpl 201d ) , our wholly-owned subsidiaries . our pipeline systems transport crude oil and refined products primarily in the midwest and gulf coast regions to our refineries , our terminals and other pipeline systems . our mpl and orpl wholly-owned and undivided interest common carrier systems consist of 1737 miles of crude oil lines and 1825 miles of refined product lines comprising 32 systems located in 11 states . the mpl common carrier pipeline network is one of the largest petroleum pipeline systems in the united states , based on total barrels delivered . our common carrier pipeline systems are subject to state and federal energy regulatory commission regulations and guidelines , including published tariffs for the transportation of crude oil and refined products . third parties generated 13 percent of the crude oil and refined product shipments on our mpl and orpl common carrier pipelines in 2009 . our mpl and orpl common carrier pipelines transported the volumes shown in the following table for each of the last three years . pipeline barrels handled ( thousands of barrels per day ) 2009 2008 2007 .

2009: crude oil trunk lines: 1279
refined products trunk lines: 953
total: 2232
2008: crude oil trunk lines: 1405
refined products trunk lines: 960
total: 2365
2007: crude oil trunk lines: 1451
refined products trunk lines: 1049
total: 2500

we also own 196 miles of private crude oil pipelines and 850 miles of private refined products pipelines , and we lease 217 miles of common carrier refined product pipelines . we have partial ownership interests in several pipeline companies that have approximately 780 miles of crude oil pipelines and 3600 miles of refined products pipelines , including about 970 miles operated by mpl . in addition , mpl operates most of our private pipelines and 985 miles of crude oil and 160 miles of natural gas pipelines owned by our e&p segment . our major refined product pipelines include the owned and operated cardinal products pipeline and the wabash pipeline . the cardinal products pipeline delivers refined products from kenova , west virginia , to columbus , ohio . the wabash pipeline system delivers product from robinson , illinois , to various terminals in the area of chicago , illinois . other significant refined product pipelines owned and operated by mpl extend from : robinson , illinois , to louisville , kentucky ; garyville , louisiana , to zachary , louisiana ; and texas city , texas , to pasadena , texas . in addition , as of december 31 , 2009 , we had interests in the following refined product pipelines : 2022 65 percent undivided ownership interest in the louisville-lexington system , a petroleum products pipeline system extending from louisville to lexington , kentucky ; 2022 60 percent interest in muskegon pipeline llc , which owns a refined products pipeline extending from griffith , indiana , to north muskegon , michigan ; 2022 50 percent interest in centennial pipeline llc , which owns a refined products system connecting the gulf coast region with the midwest market ; 2022 17 percent interest in explorer pipeline company , a refined products pipeline system extending from the gulf coast to the midwest ; and 2022 6 percent interest in wolverine pipe line company , a refined products pipeline system extending from chicago , illinois , to toledo , ohio . our major owned and operated crude oil lines run from : patoka , illinois , to catlettsburg , kentucky ; patoka , illinois , to robinson , illinois ; patoka , illinois , to lima , ohio ; lima , ohio to canton , ohio ; samaria , michigan , to detroit , michigan ; and st . james , louisiana , to garyville , louisiana . as of december 31 , 2009 , we had interests in the following crude oil pipelines : 2022 51 percent interest in loop llc , the owner and operator of loop , which is the only u.s . deepwater oil port , located 18 miles off the coast of louisiana , and a crude oil pipeline connecting the port facility to storage caverns and tanks at clovelly , louisiana ; 2022 59 percent interest in locap llc , which owns a crude oil pipeline connecting loop and the capline system; .

Questions:
what was the number of refined products trunk lines in 2009?
what was the number in 2008?
what is the sum?
what was the number in 2007?
what is the total sum?

Answers:
953
960
1913
1049
2962