Table 2.

Variance analysis (first eight principal components).

Principal Component	Standard Deviation	Proportion of Variance	Cumulative Proportion
PC1	5157.11860	0.78068	0.78068
PC2	2311.49810	0.15684	0.93752
PC3	866.34106	0.02203	0.95955
PC4	581.91444	0.00994	0.96949
PC5	496.66847	0.00724	0.97673
PC6	405.79667	0.00483	0.98156
PC7	327.32049	0.00314	0.98471
PC8	284.63234	0.00238	0.98708