I can't read the article, but there post I could read said 48% used all their vacation. But what does "use all vacation" mean? I tried to keep a small buffer. I

I can't read the article, but there post I could read said 48% used all their vacation. But what does "use all vacation" mean? I tried to keep a small buffer. I used all the vacation I earned in a year, but I like keeping a couple of weeks just in case. So the answer for me works have been no I don't use all my vacation.