年份

tfp

effch

tech

2015

0.509

0.704

0.749

2016

0.572

0.572

0.746

2017

0.6300

0.7600

0.8510

2018

0.557

0.726

0.803

2019

0.437

0.637

0.743

2020

0.383

0.633

0.67

均值

0.514

0.672

0.760