Energy Investment Potential and Strategic Layout in Countries along the “Belt and Road” Based on Principal Component Analysis

Table 4

Variance contribution rate and cumulative variance contribution rate of principal components.

Component number	Eigenvalue	Variance contribution rate	Cumulative
1	7.608	26.234	26.234
2	3.534	12.186	38.421
3	2.919	10.066	48.486
4	2.688	9.268	57.754
5	2.301	7.936	65.690
6	1.398	4.821	70.511
7	1.228	4.234	74.745
8	0.970	3.346	78.091
9	0.883	3.044	81.134
10	0.780	2.690	83.824
11	0.736	2.537	86.361
12	0.660	2.275	88.636
13	0.527	1.818	90.454
14	0.458	1.580	92.034
15	0.419	1.445	93.479
16	0.365	1.258	94.737
17	0.285	0.982	95.719
18	0.278	0.960	96.679
19	0.203	0.701	97.380
20	0.181	0.625	98.006
21	0.154	0.532	98.538
22	0.125	0.431	98.969
23	0.091	0.315	99.284
24	0.059	0.205	99.489
25	0.057	0.195	99.685
26	0.042	0.144	99.829
27	0.027	0.092	99.921
28	0.016	0.057	99.978
29	0.006	0.022	100.000