highly significantP < 0.0001
In all cases, there were highly significant correlations (Linear regressions; whole period: r 2 = 0.292, F 1,453 = 188.1, P < 0.0001; 2015: r 2 = 0.252, F 1,157 = 54.3, P < 0.0001; 2016: r 2 = 0.377, F 1,134 = 82.6, P < 0.0001; 2017: r 2 = 0.343, F 1,158 = 84.0, P < 0.0001; SI Appendix , Fig.