	ID	R²
	ID	All	Road	Rail	IWW
Linear	4	0.960	0.980	0.629	0.914
	5	0.970	0.985	0.736	0.939
	6	0.975	0.987	0.772	0.953
Log	9	0.958	0.979	0.607	0.924
	10	0.964	0.982	0.655	0.938
	11	0.974	0.987	0.769	0.951
Iter	12	0.891	0.953	0.061	0.863
Iter	13	0.945	0.979	0.383	0.898