Conditional Formatting duplicating rules

Hello I have series of Raws, I need to make each raw based on the duplication of a number in a column highlighted 

for ex want all 9 years below to be highlighted in raw

Ahmed  9 years  Class C

Mostafa 9 Years  Class B

Tarek     8 years  Class V

Yassin   7 years  class D

Nadia  9 years   Class F