年份

回归方程

R²

2016

y = 80.901e^2E−06x

R² = 0.8604

2017

y = 100.12e^2E−06x

R² = 0.7097

2018

y = 81.295e^2E−06x

R² = 0.8005

2019

y = 90.829e^2E−06x

R² = 0.7902

2020

y = 94.12e^2E−06x

R² = 0.8323