2012

2013

2014

2015

2016

2017

2018

2019

2020

X₀

10.3

10.63

11.13

11.73

13.71

14.3

14.4

14.9

16.3

X₁

8.96

9.57

10.28

10.92

12.14

13.35

14.58

15.33

15.58

X₂

14.61

15.64

16.4

17.02

17.82

18.8

20.65

21.33

22.64

X₃

3465

4929

4987

5016

5011

5144

5298

5610

5905

X₄

4589

5170

5556

6362

7596

8611

9496

10,183

10,968

X₅

35.1

35.4

36

35

33.6

33.8

37.2

36.4

39.1

X₆

30.2

28.8

26.8

26.2

25.1

24.7

24.1

23.4

25.7

X₇

89.3

89.6

89.6

87.9

87.6

97.9

87.5

87.1

87.2