| X1 | X2 | X3 | X4 | X5 | X6 | Average value |
Shanghai | 0.685 | 0.703 | 0.641 | 0.822 | 0.757 | 0.645 | 0.709 |
Nantong | 0.689 | 0.682 | 0.719 | 0.603 | 0.640 | 0.619 | 0.659 |
Suzhou | 0.861 | 0.866 | 0.682 | 0.819 | 0.606 | 0.956 | 0.798 |
Zhenjiang | 0.828 | 0.648 | 0.870 | 0.665 | 0.737 | 0.765 | 0.752 |
Nanjing | 0.704 | 0.636 | 0.718 | 0.821 | 0.730 | 0.663 | 0.712 |
Ningbo | 0.687 | 0.640 | 0.685 | 0.734 | 0.941 | 0.565 | 0.709 |
Zhoushan | 0.920 | 0.746 | 0.614 | 0.929 | 0.855 | 0.701 | 0.794 |
Wenzhou | 0.939 | 0.598 | 0.920 | 0.977 | 0.605 | 0.797 | 0.806 |
Average value | 0.789 | 0.690 | 0.731 | 0.796 | 0.734 | 0.714 | 0.742 |