Table 5.

Evaluation results of catboost regression model.

Year	R 2	RMSE
2000	0.786 ± 0.010	0.074 ± 0.002
2005	0.770 ± 0.020	0.077 ± 0.004
2010	0.804 ± 0.015	0.073 ± 0.003
2015	0.786 ± 0.011	0.076 ± 0.002
2020	0.706 ± 0.018	0.082 ± 0.001