That means that on April 16, the target for the government is to have every measure—by last count, over 160 measures—from Budget 2018 showing up within the main estimates.
I can say that over the past few years, the “roughly 75%” is more or less par for the course. It's pretty much what you would expect to see.
In defence of the government—not that I'm paid to do that, but I like to present a balanced approach—