Table 2.

Second principle components analysis

Variable	Component
	1	2	3	4
Δ P2	0.721
Δ P8	0.718
Δ P6	0.703
Δ P4	0.679
Δ P3	0.651
Δ P5	0.649
Δ P1	0.566
Δ WB1		0.845
Δ WB2		0.797
Δ WB3		0.790
Δ WB5		0.740
Δ WB4		0.732
Erg6			0.803
Erg5			0.745
Erg2			0.669
Erg1			0.646
Erg3			0.644
Erg4			0.629
DP3				0.685
DP1				0.666
DP2				0.570
DP5				0.565
DP4				0.490

Notes: Rotation convErged in 5 iterations; correlations < 0.3 suppressed