How much is the estimated life left of my HDD?

Hello dear community,

I have a WDC WD5000AZRX-00A8LB0 500 GB (Green) HDD.

A friend of mine gave it to me about 8-9 months ago;so I would like to know how much estimated life left of this drive I can expect?

Here you are a screenshot of the Western Digital Dashboard S.M.A.R.T Extended Test Results:

I am mostly concerned about its ‘Power-On Hours’ value .

But I must say that I have never had any problems with the drive.

Please tell me about its estimated life left.

Thanks to all in advance.