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Table 7 Per capita disposable income of urban households in four cities from 2016 to 2023 (Unit: yuan)

From: Prediction of population aging trend and analysis of influencing factors based on grey fractional-order and grey relational models: a case study of Jiangsu Province, China

Year

2016

2017

2018

2019

2020

2021

2022

2023

Nanjing

49,997

54,538

59,308

64,372

67,553

73,593

76,643

79,858

Suzhou

54,341

58,806

63,481

68,629

70,966

76,888

79,537

82,989

Nantong

39,247

42,756

46,321

50,217

52,484

57,289

59,605

62,512

Xuzhou

28,421

30,987

33,586

36,215

37,523

40,842

42,610

44,796