Ask HN: How much of your code gets thrown away?

Throughout your career have you noticed any patterns in how much of the code you've written gets tossed? I am 2 YOE, so very junior, and I would say that probably 95% of the code I've written ends up getting tossed?

That said, this isn't to say that I write useless code, it's just that very few things I write are used for more than 1-2 months, at which point our team moves onto different things.

Curious if you've noticed less code being thrown away as you grow in your career, and if not, what the pattern has been for you.