Financial report context:
devon energy corporation and subsidiaries notes to consolidated financial statements 2013 ( continued ) proved undeveloped reserves the following table presents the changes in devon 2019s total proved undeveloped reserves during 2014 ( in mmboe ) . .

Financial table:
u.s .: proved undeveloped reserves as of december 31 2013; canada: 258; total: 443; column_4: 701
u.s .: extensions and discoveries; canada: 153; total: 8; column_4: 161
u.s .: revisions due to prices; canada: -1 ( 1 ); total: -34 ( 34 ); column_4: -35 ( 35 )
u.s .: revisions other than price; canada: -61 ( 61 ); total: 18; column_4: -43 ( 43 )
u.s .: sale of reserves; canada: -4 ( 4 ); total: -2 ( 2 ); column_4: -6 ( 6 )
u.s .: conversion to proved developed reserves; canada: -40 ( 40 ); total: -49 ( 49 ); column_4: -89 ( 89 )
u.s .: proved undeveloped reserves as of december 31 2014; canada: 305; total: 384; column_4: 689

Additional report context:
at december 31 , 2014 , devon had 689 mmboe of proved undeveloped reserves . this represents a 2 percent decrease as compared to 2013 and represents 25 percent of total proved reserves . drilling and development activities increased devon 2019s proved undeveloped reserves 161 mmboe and resulted in the conversion of 89 mmboe , or 13 percent , of the 2013 proved undeveloped reserves to proved developed reserves . costs incurred related to the development and conversion of devon 2019s proved undeveloped reserves were approximately $ 1.0 billion for 2014 . additionally , revisions other than price decreased devon 2019s proved undeveloped reserves 43 mmboe primarily due to evaluations of certain u.s . onshore dry-gas areas , which devon does not expect to develop in the next five years . the largest revisions , which were approximately 69 mmboe , relate to the dry-gas areas in the barnett shale in north texas . a significant amount of devon 2019s proved undeveloped reserves at the end of 2014 related to its jackfish operations . at december 31 , 2014 and 2013 , devon 2019s jackfish proved undeveloped reserves were 384 mmboe and 441 mmboe , respectively . development schedules for the jackfish reserves are primarily controlled by the need to keep the processing plants at their 35000 barrel daily facility capacity . processing plant capacity is controlled by factors such as total steam processing capacity and steam-oil ratios . furthermore , development of these projects involves the up-front construction of steam injection/distribution and bitumen processing facilities . due to the large up-front capital investments and large reserves required to provide economic returns , the project conditions meet the specific circumstances requiring a period greater than 5 years for conversion to developed reserves . as a result , these reserves are classified as proved undeveloped for more than five years . currently , the development schedule for these reserves extends though the year 2031 . price revisions 2014 2013 reserves increased 9 mmboe primarily due to higher gas prices in the barnett shale and the anadarko basin , partially offset by higher bitumen prices , which result in lower after-royalty volumes , in canada . 2013 2013 reserves increased 94 mmboe primarily due to higher gas prices . of this increase , 43 mmboe related to the barnett shale and 19 mmboe related to the rocky mountain area . 2012 2013 reserves decreased 171 mmboe primarily due to lower gas prices . of this decrease , 100 mmboe related to the barnett shale and 25 mmboe related to the rocky mountain area. .

Question: as of december 31 2013 what was the percentage of the proved undeveloped reserves in the us
Answer: 37%