Spatial-Temporal Variation of Population Aging: A Case Study of China’s Liaoning Province

Table 2

SDE parameters variation of population aging in 1990, 2000, and 2010.

Year	Long axis (x)	Short axis (y)	Rotation	Area	Axial ratio
1990	125.077	173.780	42.225	6.828 × 104	0.720
2000	126.849	169.813	49.189	6.767 × 104	0.747
2010	127.910	168.008	53.137	6.751 × 104	0.761