11-5  Basic Statistics on City Public Utilities
Data have covered the public utilities of all city units.
Item	1990	1995	2000	2005	2006
City Areas and Floor Space of Buildings
Developed Areas                                                  (sq.km)	12856	19264	22439	32521	33660
Population Density of City Districts (persons/sq.km)	279	322	442	870	2238
Total Floor Space of Buildings at the year-end	39.8	57.3	76.6	164.5	174.5
(100 million sq.m)
Total Floor Space of Residential Buildings	20.0	31.0	44.1	107.7	112.9
at the year-end                               (100 million sq.m)
Water Supply, Gas Supply and Heating
Annual Volume of Tap Water Supply  (100 million cu.m)	382.3	481.6	469.0	502.1	540.5
Water Consumption for Residential use	100.1	158.1	200.0	243.7	222.0
Per Capita Water Consumption for Residential Use	67.9	71.3	95.5	74.5	68.7
(ton)
Coverage Rate of Urban Population with Access to Tap	48.0	58.7	63.9	91.1	86.7
Water                                                                     (%)
Gaswork Gas Supply                       (100 million cu.m)	174.7	126.7	152.4	255.8	296.5
Consumption of Gaswork Gas for Residential Use	27.4	45.7	63.1	45.9	38.2
Natural Gas Supply                          (100 million cu.m)	64.2	67.3	82.1	210.5	244.8
Consumption of Natural Gas for Residential Use	11.6	16.4	24.8	52.1	57.3
Liquefied Petroleum Gas                           (10 000 tons)	219.0	488.7	1053.7	1222.0	1263.7
Consumption of Liquefied Gas for Residential Use	142.8	370.2	532.3	706.5	693.7
(10 000 tons)
Length of Gas Pipelines                             (10 000 km)	2.4	4.4	8.9	16.2	18.9
Coverage Rate of Urban  Population with Access to Gas (%)	19.1	34.3	45.4	82.1	79.1
Area of Centralized Heating            (100 million sq.m)	2.1	6.5	11.1	25.2	26.6
Municipal Infra-structure
Length of Paved Roads at Year-end          (10 000 km)	9.5	13.0	16.0	24.7	24.1
Length of Paved Roads Per 10 000 Population     (km)	3.1	3.8	4.1	6.9	6.5
Area of Paved Roads at Year-end     (100 million sq.m)	8.9	13.6	19.0	39.2	41.1
Per Capita Area of Paved Roads                          (sq.m)	3.1	4.4	6.1	10.9	11.0
Length of City Sewage Pipes                      (10 000 km)	5.8	11.0	14.2	24.1	26.1
Density of City Sewage Pipes                       (km/sq.km)	4.5	5.7	6.3	7.4	7.8
Public Traffic
Number of Public Vehicles under Operation at Year-end	6.2	13.7	22.6	31.3	31.6
(Buses and Trolley Buses, etc.)            (10 000 units)
Number of Public Transportation Vehicles	2.2	3.6	5.3	8.6	9.1
Per 10 000 Population                                        (unit)
Taxis                                                        (10 000 units)	11.1	50.4	82.5	93.7	92.9
City Greening
Area of Urban Green Areas                   (10 000 hectares)	47.5	67.8	86.5	146.8	132.1
Per Capita Park Green Area                             (sq.m)	1.8	2.5	3.7	7.9	8.3
Number of Parks and Zoos                                    (unit)	1970	3619	4455	7077	6908
Area of Parks                                     (10 000 hectares)	3.9	7.3	8.2	15.8	20.8
Environmental Sanitation
Volume of Garbage Disposal                   (10 000 tons)	6767	10671	11819	15577	14841
Volume of Disposal of Excrement and Urine	2385	3066	2829	3805	2131
(10 000 tons)
Number of Public Lavatories per 10 000 Population	3.0	3.0	2.7	3.2	2.9
(unit)
a) Per capita data and coverage rate are calculated on the basis of urban population. Since 2006, those indicators are calculated on the basis of the sum
of districts area population and temporarily residing population, which are provided by the Ministry of Public Security.