| Henan | Shanxi | Hunan | Guangdong | Zhejiang | Jiangsu |
2017 | 0.011 | 0.010 | 0 | 0 | 0 | 0 |
2018 | 0.010 | 0 | 0.010 | 0 | 0.010 | 0.010 |
2019 | 0 | 0 | −0.010 | 0 | 0 | 0 |
2020 | −0.032 | 0 | −0.010 | 0 | 0 | 0 |