How to link and highlight the year only, instead of the author name and year together [duplicate]

I am using hyperref to color my links, and using author year citation style. I cite a lot of works and so my text looks like a mess of black text and colored text now.

How can I just highlight the year instead of the author name and year together ? Is it possible to remove the link from the author name ?

This is the current output and desired output:

In tex file

\documentclass[a4paper,12pt,oneside]{report}

\usepackage{hyperref}

\usepackage[round]{natbib}
\bibliographystyle{plainnat}

% --------------------------------------------- %

\begin{document}

Some text \cite{xu2005survey}, some text \cite{xu2005survey}

\bibliography{biblio}

\end{document}


In bib file

@article{xu2005survey,
title={Survey of clustering algorithms},
author={Xu, Rui and Wunsch, Donald},
journal={IEEE Transactions on neural networks},
volume={16},
number={3},
pages={645--678},
year={2005},
publisher={Ieee}
}