I am not clear on the usage of 偏上 in the following sentence:
此前,《时代》周刊和皮尤研究中心也分别做过类似国家形象的调查。结果均显示,中国的受欢迎程度排名中偏上,但都远远落后于日本的排名。
My translation: Prior to this research, ShiDai publication and Pew did a separate investigation of... Similar countries? All of the results show that China's acceptance rating is... Skewed/biased/prejudiced? But all still lag behind Japan?
Thanks for your help.