Table 5. Errors under different data sizes.

	MRE	MRE	MRE	RMSE	RMSE	RMSE
Data Size	120K	360K	600K	120K	360K	600K
Linear	0.0863	0.0537	0.0383	9.6957	5.5881	4.5037
Pchip	0.0936	0.0575	0.0416	10.3896	5.9640	4.8847
Spline	0.1033	0.0621	0.0466	11.2769	6.5701	5.3600