Please answer the given financial question based on the context.
Context: item 1b . unresolved staff comments item 2 . properties we employ a variety of assets in the management and operation of our rail business . our rail network covers 23 states in the western two-thirds of the u.s . our rail network includes 31974 route miles . we own 26012 miles and operate on the remainder pursuant to trackage rights or leases . the following table describes track miles at december 31 , 2014 and 2013 . 2014 2013 .
||2014|2013|
|route|31974|31838|
|other main line|6943|6766|
|passing lines and turnouts|3197|3167|
|switching and classification yard lines|9058|9090|
|total miles|51172|50861|
headquarters building we own our headquarters building in omaha , nebraska . the facility has 1.2 million square feet of space for approximately 4000 employees. .
Question: what percentage of total miles were other main line in 2014?


Answer: The answer is:0.13568