Update README.md

Author: khuyentran1401

README.md

@@ -5,6 +5,11 @@ Collection of useful data science topics along with code and articles in my [dat
 
 If you want to received updates of these blogs in your mailbox, you can subscribe to [my Medium newsletter](https://khuyentran1476.medium.com/subscribe). To received bite-sized Python and daily data science tips in your mailbox, you can subscribe to [Data Science Simplified](https://mathdatasimplified.com/).
 
+## Star History
+
+[![Star History Chart](https://api.star-history.com/svg?repos=khuyentran1401/Data-science&type=Date)](https://star-history.com/#khuyentran1401/Data-science&Date)
+
+
 ## How to Download the Code in This Repository to Your Local Machine
 
 To download the code in this repo, you can simply use git clone