Here's something I've always wondered.

I (like probably a lot of other people reading this) wouldn't mind winning something in Lotto, or even Instant Kiwi. I mean a significant prize - $15 is nice, but I won't be retiring on it :D

I've always wondered with the winning ticket, are most of the winners numbers chosen by the punter, or are they random numbers chosen by the machine (Lucky Dip)? I'd be curious to know the breakdown - is it 50% chosen, 50% random, or...?
I know the odds of winning the big prize are quite low, but it's something I've always wondered about and I can't seem to find a breakdown online anywhere.