<blank> years of service

[Krytic]

But how would I calculate the time for each year? That's what I get messed up with.

Math and basic knowledge... Two code suggestions were posted above. The 2nd works for all years, just add proper CSS which is also mentioned by Adamas.

I mean must I do for two years and three years as I am still getting into PHP

I apologise for the delayed response. If you're still looking for an answer, no. The only thing you need to worry about is adding new CSS definitions to style each bar. The text itself automatically updates for every user.