Mode

Kalnins [26]

Navaratna [28]

Greene et al. [30]

Cohen

[27]

Gautham and Ganesan [32]

Buchanan and Rich [33]

Present theory

1

0.962

0.963

0.974

0.959

-

0.956

0.981

2

1.334

1.338

1.338

1.325

1.315

1.308

1.412

3

-

1.653

1.652

1.646

1.639

1.612

1.646

4

2.128

2.131

2.162

-

-

2.044

2.038

5

-

2.141

-

-

-

2.059

2.115

6

3.176

3.185

-

-

-

2.965

2.934

7

3.988

3.933

-

-

-

3.837

3.871

8

-

4.159

-

-

-

4.000

4.017

9

4.575

4.601

-

-

-

4.148

4.138

10

-

6.031

-

-

-

5.608

5.773