Table 2.

Result of Principal Component Analysis (PCA).

Component	Component 1	Component 2	Component 3	Component 4	Component 5	Component 6	Component 7	Component 8
Explained variance ratio	3.2577 × 10−1	2.4887 × 10−1	1.8480 × 10−1	1.0766 × 10−1	1.0095 × 10−1	2.9845 × 10−2	1.8180 × 10−3	2.8770 × 10−4
Cumulative explained variance	0.32577	0.57464	0.75944	0.86710	0.96805	0.997895	0.999713	1.00000