Table 2.

PCA results.

No.	Eigenvalue	Contribution Rate	Accumulated Contribution Rate
1	8.4115	70.0955	70.0955
2	2.3058	19.2146	89.3101
3	0.5775	4.8127	94.1227
4	0.3452	2.8769	96.9996
5	0.2226	1.8553	98.8549
6	0.0600	0.5001	99.3550
7	0.0399	0.3324	99.6874
8	0.0177	0.1478	99.8352
9	0.0092	0.0768	99.9119
10	0.0048	0.0403	99.9523
11	0.0031	0.0258	99.9781
12	0.0026	0.0219	100.0000