how much money should i realistically have in savings by the time i am uni

i am 17 and have a summer job which i will have again next summer and so on. I am really precise about my money and calculate all my spending. i always put at least 50% of whatever money i get immediately in savings.

It is really difficult to find a job where i live and am worries about my future in that regard.

Basically what i am ask in is how much money should i have saved by the time i start university in 2 years (hopefully).