18-16  Basic Statistics on National Railways in Operation|18-16BasicStatisticsonNationalRailwaysinOperation|Item|1985|1990|2000|2005|2010|2013|2014||LengthofRailwaysinOperation(km)|52119|53378|58655.9|62200|66239.019|66585.052|66989.216|InFormalOperation|49433|50310|51262|57588.6|64537.231|66490.311|66894.475|InTemporaryOperation|2686|3068|7393.9|4611.4|1701.8|94.7409999999945|94.7409999999945|ProportionoftheLengthinFormalOperation|94.8|94.3|87.3942989634479|92.6|97.4308375551275|99.8577143110138|99.8585727589348|Double-TrackingLength(km)|9989|13024|21408|24497.2|29683.617|31854.468|32545.762|AsPercentageoftheLengthofRailways|19.2|24.4|36.4974367454936|39.4|44.8128874010045|47.8402690141325|48.5835839607378|inOperation|||LengthofElectrifiedRailways(km)|4151|6941|14863.9|19408.2|32717.228|35977.248|36851.383|AsPercentageofRailwaysinOperation|8|13|25.3408438025842|31.2|49.3926819779743|54.0320190783962|55.0109184738033|LengthofDieselEngineRoutes(km)|10822|16097|39496.6|42791.8|33521.791|30607.804|30137.833|AsPercentageofRailwaysinOperation|20.8|30.2|67.3361077061302|68.8|50.6073180220257|45.9679809216038|44.9890815261967|LengthunderCentralizedTrafficControl(km)|1307|1169|1199.6|1827.7|17976.779|20444.097|15476.975|AutomaticBlockingLength(km)|6921|10370|18317.8|24148.9|37500|38839.647|35395.93|Semi-automaticBlockingLength(km)|42625|38832|41694.5|39389.9|37468|32893.183|30177.759|LengthofContinuousWeldedRail(km)|10439|14644|29975.1|47964.9|62953.6|81055.197|87695.2|RelayInterlockingStation(unit)||||3065|2492|2210|AsPercentageofStationsinOperation|51.4|47.4|42.1514400152584|ComputerInterlockingStation(unit)|2792|3058|3048|AsPercentageofStationsinOperation|46.9|58.2|58.1346557314515|