Basic Statistics on Urban Infrastructure
Item	2012	2013	2014	2015
Urban Facilities
Population Density                                 (person/sq.km)	1349	1361	1426	1452
Per Capita Daily Water Consumption                   (litre)	131.6	134.9	138.8	138.5
Coverage Rate of Water Supply                               (%)	99.9	99.9	99.9	100.0
Coverage Rate of Natural Gas Supply                      (%)	99.5	99.6	99.5	99.4
Per Capita Area of Roads                                    (sq.m)	24.7	25.3	25.8	25.8
Built-up Area Density of Sewage Pipelines (km/sq.km)	11.0	11.0	10.8	11.3
Per Capita Public Green Areas                            (sq.m)	16.4	16.8	17.1	17.4
Coverage Rate of Urban Green Areas                      (%)	42.1	42.6	42.8	42.3
Water Supply
Volume of Water Supply                         (10 000 cu.m)	327449	331898	347781	355903
For Productive Use                                (10 000 cu.m)	143546	140888	144396	147925
Population Using Water                      (10 000 persons)	2887	2941	3036	3129
Public Transportation
Volume of Passenger Traffic       (10 000 person-times)	398268	411311	403854	389972
Number of Operating Vehicles                              (unit)	32869	35031	34138	39734
Number of Taxis                                                    (unit)	58758	59080	60119	61231
Infrastructure by City
Area of Roads                                          (10 000 sq.m)	71390	74646	78308	80847
Area of Sidewalks                                 (10 000 sq.m)	14971	15701	16359	16862
Length of Roads                                                     (km)	36566	37821	39404	40426
Number of Streetlights                                          (unit)	1629070	1687459	1789706	1864921
Numer of Bridges                                                  (unit)	4660	4769	5109	5212
Volume of Waste Water Discharged         (10 000 tons)	277438	281133	295185	302129
Volume of Waste Water Treated               (10 000 tons)	261415	266889	280596	289339
Parks,Gardens and Green Areas
Garden Green Area                                                  (ha)	176342	193647	205208	213517
Park  Green Area                                                      (ha)	47318	49518	51952	54345
Coverage of Green Area                                           (ha)	199899	217366	232174	240024
Coverage of Urban Green Area                             (ha)	165409	178529	188277	194763
Number of Parks                                                    (unit)	686	733	790	828
Area of Parks                                                            (ha)	25023	29466	32621	34112