11-4   Basic Statistics on Urban Public Utilities
Data since 1990 have covered the public utilities of all urban units, whereas data in the preceding years only covered the urban units under
the city construction department.
Item	1985	1990	1995	2000	2001
Cities Areas and Floor Space of Buildings
Developed Areas                                         (sq.m)	9386	12856	19264	22439	24027
Population Density of Urban Districts (persons/sq.km)	262	279	322	441	588
Total Floor Space of Buildings     (year-end)
(100 million sq.m)	23.2	39.8	57.3	76.6	110.1
Total Floor Space of Residential Buildings
(year-end)                              (100 million sq.m)	11.3	20.0	31.0	44.1	66.5
Total Use Space of Residential Buildings
(year-end)                              (100 millionsq.m)		14.4	26.6	32.4	49.5
Water Supply, Gas Supply and Heating
Annual Supply of Tap Water (100 million tons)	128.0	382.3	496.6	469.0	466.1
Water Consumption for Residential use	51.9	100.1	158.1	200.0	144.8
Per Capita Water Consumption for	55.1	67.9	71.3	95.5	56.0
Residential Use                          (ton)
Percentage of Population with Access to Tap	81.0	89.2	93.0	96.7	72.3
Water                                     (%)
Coal Gas Supply             (10 000 cu.m)	249754	1747065	1266894	1523615	1369143.75
Consumption of Coal Gas for Residential Use	107060	274127	456585	630937	494191.15
Natural Gas Supply                 (10 000 cu.m)	162099	642289	673354	821476	1055196
Consumption of Coal Gas for Residential Use		115662	163788	247580	299543
Liquefied Petroleum Gas  (10 000 ton)		203.0	488.7	1053.7	975.8
Consumption of Liquefied Gas for Residential	54.7	142.8	370.2	532.3	553.1
Use                           (10 000 ton)
Length of Gas Pipelines                     (km)	10567	16312	33890	48376	50114
Percentage of Population with Access to Gas (%)	22.4	42.2	70.0	84.2	60.4
Heated Area (10 000 sq.m)		21263	64645	110766	146329
Municipal Engineering
Length of Paved Roads                       (km)	38282	94820	130308	159617	176016
Length of Paved Roads per 10 000 Population (km)	3.3	6.4	7.0	7.6	8.2
Area of Paved Roads                (10 000 sq.m)	35872	89160	135810	190357	249431
Area of Paved Roads per 10 000 Population	3.1	6.0	7.3	9.1	11.6
Length of Sewer Pipelines                   (km)	31556	57787	110293	141758	158128
Length of Sewer Pipelines per 10 000 Population (km)	2.7	3.9	6.0	6.8	7.3
Public Traffic
Number of Public Transportation Vehicles
(Buses and Trolley Buses etc.)      (unit)	45155	62215	136821	225993	229832
Number of Public Transportation Vehicles
per 10 000  Population             (unit)	3.9	4.8	7.3	10.8	10.1
Taxi (10 000 units)		11.1	50.4	82.6	87.0
Afforestation in Cities
Public Green Areas                     (hectare)	159291	474613	678310	865295	946634
Public Green Areas per 10 000 Population (hectare)	13.7	32.2	36.7	41.3	38.6
Number of Parks and Zoos	1026	1970	3619	4455	4850
Area of Parks and Zoos                 (hectare)	21896	40081	72857	82090	90621
Environmental Sanitation
Volume of Garbage Disposal         (10 000 tons)	4477	6767	10748	11819	13470
Volume of Disposal of Excrement and Urine	1731	2385	3071	2829	2990
(10 000 tons)
Number of Public Lavatories per 10 000 Population	5.8	6.6	6.1	5.1	5.0
a)Data on the public utilities per 10 000 population are based on the non-agricultural population in urban areas, but based on the total population in 2001.