Table 2: The urban area and population of Beijing from 1991 to 2005.

YearOriginal dataLogarithmic valueStandardization
Urban population (10,000)Built-up area (km2)

1991629.6397.46.4455.985
1992634.7429.46.4536.062
1993640.8454.16.4636.118
1994649.6467.06.4766.146
1995656.1476.86.4866.167
1996662.8476.86.4966.167
1997670.0488.16.5076.191
1998675.3488.36.5156.191
1999682.4488.36.5266.191
2000690.9490.16.5386.195
2001861.4747.86.7596.6170.3870.485
2002949.71043.56.8566.9500.7481.282
2003962.71180.16.8707.0730.7991.577
20041187.01182.37.0797.0751.5731.581
20051538.01200.07.3387.0902.5321.617

Average806.1667.36.6546.4150.0000.000

Stdev260.3313.40.2700.4181.0001.000

Original data source: The Ministry of Housing and Urban-Rural Development of China and 1991–2005 Statistic Annals of China’s Urban Construction.