25-3  Basic Statistics on City Public Utilities|25-3BasicStatisticsonCityPublicUtilities|Datahavecoveredthepublicutilitiesofallcityunits.|Item|1990|1995|2000|2010|2013|2014||CityAreasandFloorSpaceofBuildings|UrbanArea(sq.km)|1165970|1171698|878015|178691.73|183416.05|184098.59|AreaofBuiltDistricts(sq.km)|12856|19264|22439|40058.01|47855.28|49772.63|AreaofLandUsedforUrbanConstruction(sq.km)|11608.3|22064|22113.7|39758.42|47108.5|49982.74|PopulationDensityofCityDistricts(persons/sq.km)|279|322|442|2209|2362|2419|WaterSupply,GasSupplyandHeating|AnnualVolumeofTapWaterSupply(100millioncu.m)|382.3|481.6|468.9838|507.874514|537.302171|546.661256|WaterConsumptionforResidentialUse|100.1|158.1|199.996|238.752505|267.6465595856|275.691137|PerCapitaWaterConsumptionforResidentialUse(ton)|67.9|71.3|95.5|62.6|63.33115|63.41145|CoverageRateofUrbanPopulationwithAccesstoTap|48|58.7|63.9|96.68|97.56|97.64|Water(%)|GasworkGasSupply(100millioncu.m)|174.7|126.7|152.4|279.938034|62.798877|55.951269|ConsumptionofGasworkGasforResidentialUse|27.4|45.7|63.1|26.876319|16.788553|14.577267|NaturalGasSupply(100millioncu.m)|64.2|67.3|82.1|487.580814|900.990392|964.378286|ConsumptionofNaturalGasforResidentialUse|11.6|16.4|24.8|117.15962|185.410694|196.887842|LiquefiedPetroleumGas(10000tons)|219|488.7|1053.7147|1268.00535|1109.729791|1082.849026|ConsumptionofLiquefiedGasforResidentialUse|142.8|370.2|532.2828|633.85226|613.063892|586.212486|LengthofGasPipelines(10000km)|2.4|4.4|8.9|30.867964|43.237709|47.460026|CoverageRateofUrbanPopulationwithAccesstoGas(%)|19.1|34.3|45.4|92.04|94.25|94.57|AreaofCentralizedHeating(100millionsq.m)|2.1|6.5|11.1|43.5668|57.167658|61.124586|MunicipalInfra-structure|LengthofPavedRoadsatYear-end(10000km)|9.5|13|16|29.4443|33.630375|35.233333|LengthofPavedRoadsPer10000Persons(km)|3.1|3.8|4.1|7.46014573536566|7.76357779904677|7.91261708352759|AreaofPavedRoadsatYear-end(100millionsq.m)|10.2|16.5|23.8|52.13218|64.415475|68.30279|PerCapitaAreaofPavedRoads(sq.m)|3.1|4.4|6.1|13.21|14.87|15.339276105573|LengthofCitySewagePipes(10000km)|5.8|11|14.2|36.9553|46.487782|51.11785|PublicTraffic|NumberofPublicVehiclesunderOperationatYear-end|6.2|13.7|22.6|38.3|46.1|47.6255|(BusesandTrolleyBuses,etc.)(10000units)|NumberofPublicTransportationVehicles|2.2|3.6|5.3|11.2|12.7770490607399|12.9935204873154|Per10000Persons(unit)|Taxis(10000units)|11.1|50.4|82.5|98.6|105.358|107.4386|CityGreening|AreaofGreenLand(10000hectares)|47.5|67.8|86.5|213.4339|242.722087|252.796249|PerCapitaAreaofParksandGreenLand(sq.m)|1.8|2.5|3.7|11.18|12.6357221247265|13.08|NumberofParksandZoos(unit)|1970|3619|4455|9955|12401|13037|AreaofParks(10000hectares)|3.9|7.3|8.2|25.8177|32.984148|35.242275|EnvironmentalSanitation|VolumeofGarbageDisposal(10000tons)|6767|10671|11818.88|15804.8|17238.58|17860.18|VolumeofDisposalofExcrementandUrine(10000tons)|2385|3066|2829|1950.52|1682.41|1551.97|NumberofPublicToiletsper10000Persons(unit)|3|3|2.7|3.02332475271607|2.82886107298236|2.7939698221615||a)Before2006,UrbanAreaistheareaofthecityproper.|b)Percapitadataandcoverageratearecalculatedonthebasisofurbanpopulationbefore2006.Since2006,thoseindicatorsarecalculatedonthe|basisofthesumofdistrictsareapopulationandtemporarilyresidingpopulation,whichareprovidedbytheMinistryofPublicSecurity.