年份

Y

X₁

X₂

X₃

X₄

2005

4040.3

11

4005.2

107.9

18,200

2006

4896.7

11.3

4238.6

107.7

20,856

2007

5964.9

11.6

4544

107.08

24,721

2008

7389.6

12

4868

100.95

28,898

2009

8894.4

12.5

5348

101.53

32,244

2010

10755.3

13.1

5811.6

104.91

36,539

2011

13363.2

13.7

6314

104.55

41,799

2012

16711.5

14.3

6910.9

102.03

46,769

2013

19818.7

14.9

7484.8

102.49

51,483

2014

23325.8

15.5

8013.6

100.76

56,360

2015

27929.4

16.2

8536.5

101.8

62,029

2016

34004.3

16.6

9023.9

102.5

67,569

2017

40423.8

17.3

9460.4

101.5

74,318

2018

47550.4

17.2

9980.5

101.7

82,413

2019

52342.3

18.1

10396.3

105.4

90,501

2020

54656.5

18.7

10784.2

99.7

97,379

2021

60196.5

18.9

11126.5

100.9

106,837