operating expenses millions 2013 2012 2011 % (  % ) change 2013 v 2012 % (  % ) change 2012 v 2011 .

<i>Millions</i>
<i>2013</i>
<i>2012</i>
<i>2011</i>
<i>% Change 2013 v 2012</i>
<i>% Change 2012 v 2011</i>
Compensation and benefits
$4,807
$4,685
$4,681
3 %
-%
Fuel
3,534
3,608
3,581
(2)
1
Purchased services and materials
2,315
2,143
2,005
8
7
Depreciation
1,777
1,760
1,617
1
9
Equipment and other rents
1,235
1,197
1,167
3
3
Other
849
788
782
8
1
Total
$14,517
$14,181
$13,833
2 %
3%

operating expenses increased $ 336 million in 2013 versus 2012 .
wage and benefit inflation , new logistics management fees and container costs for our automotive business , locomotive overhauls , property taxes and repairs on jointly owned property contributed to higher expenses during the year .
lower fuel prices partially offset the cost increases .
operating expenses increased $ 348 million in 2012 versus 2011 .
depreciation , wage and benefit inflation , higher fuel prices and volume- related trucking services purchased by our logistics subsidiaries , contributed to higher expenses during the year .
efficiency gains , volume related fuel savings ( 2% ( 2 % ) fewer gallons of fuel consumed ) and $ 38 million of weather related expenses in 2011 , which favorably affects the comparison , partially offset the cost increase .
compensation and benefits 2013 compensation and benefits include wages , payroll taxes , health and welfare costs , pension costs , other postretirement benefits , and incentive costs .
general wages and benefits inflation , higher work force levels and increased pension and other postretirement benefits drove the increases in 2013 versus 2012 .
the impact of ongoing productivity initiatives partially offset these increases .
expenses in 2012 were essentially flat versus 2011 as operational improvements and cost reductions offset general wage and benefit inflation and higher pension and other postretirement benefits .
in addition , weather related costs increased these expenses in 2011 .
fuel 2013 fuel includes locomotive fuel and gasoline for highway and non-highway vehicles and heavy equipment .
lower locomotive diesel fuel prices , which averaged $ 3.15 per gallon ( including taxes and transportation costs ) in 2013 , compared to $ 3.22 in 2012 , decreased expenses by $ 75 million .
volume , as measured by gross ton-miles , decreased 1% ( 1 % ) while the fuel consumption rate , computed as gallons of fuel consumed divided by gross ton-miles , increased 2% ( 2 % ) compared to 2012 .
declines in heavier , more fuel-efficient coal shipments drove the variances in gross-ton-miles and the fuel consumption rate .
higher locomotive diesel fuel prices , which averaged $ 3.22 per gallon ( including taxes and transportation costs ) in 2012 , compared to $ 3.12 in 2011 , increased expenses by $ 105 million .
volume , as measured by gross ton-miles , decreased 2% ( 2 % ) in 2012 versus 2011 , driving expense down .
the fuel consumption rate was flat year-over-year .
purchased services and materials 2013 expense for purchased services and materials includes the costs of services purchased from outside contractors and other service providers ( including equipment maintenance and contract expenses incurred by our subsidiaries for external transportation services ) ; materials used to maintain the railroad 2019s lines , structures , and equipment ; costs of operating facilities jointly used by uprr and other railroads ; transportation and lodging for train crew employees ; trucking and contracting costs for intermodal containers ; leased automobile maintenance expenses ; and tools and 2013 operating expenses .

Question: Analyse this data from a financial earnings document. what percentage of total operating expenses was fuel in 2013?
Choices:
0.00021
0.24344
-0.24344
0.00024
4.10781
Correct choice index: 1