Table 2. Collinearity diagnostics of preliminary predictor variables during the 1971–1993 and 1994–2012 epochs.

1971–1993			1994–2012
Variable	VIF	Tolerance	Variable	VIF	Tolerance
R 1	2.089	0.479	R 1	2.396	0.417
R 2	1.916	0.522	R 2	2.492	0.401
R 3	2.418	0.414	R 3	2.374	0.421
R 4	2.418	0.414	R 4	2.420	0.413
MaxT 0	17.811	0.056	R 5	2.685	0.372
MaxT 1	16.998	0.059	MaxT 1	25.397	0.039
MaxT 2	18.457	0.054	MaxT 2	25.861	0.039
MaxT 3	17.274	0.058	MaxT 3	24.316	0.041
MaxT 4	17.448	0.057	MaxT 4	25.866	0.039
MaxT 6	16.310	0.061	MinT 1	46.152	0.022
MinT 0	17.200	0.058	MinT 2	47.272	0.021
MinT 1	17.781	0.056	MinT 3	44.870	0.022
MinT 2	18.741	0.053	MinT 4	48.965	0.020
MinT 3	18.032	0.055	MinT 5	44.363	0.023
MinT 4	19.531	0.051	MT 1	122.684	0.008
MT 0	43.834	0.023	MT 2	122.022	0.008
MT 1	47.679	0.021	MT 3	118.865	0.008
MT 2	46.404	0.022	MT 4	119.947	0.008
MT 3	48.927	0.020	MT 5	64.779	0.015
MT 4	43.474	0.023	H 0	2.148	0.466
MT 6	32.013	0.031	H 1	2.944	0.340
H 0	2.189	0.457	H 5	2.730	0.366
H 3	2.712	0.369	H 6	2.039	0.490
H 4	2.454	0.408

VIF: variance inflation factors for individual variables.

Tolerances: 1/VIF