The uncertainties mount when you consider that the 63,000 species of vertebrates are vastly outnumbered by the untold millions of species of invertebrates—spineless creatures like insects, worms, jellyfish, and sponges, which make up the majority of animal life.
I don’t know about invertebrates in general but based solely on my own observation over nearly 50 years I would be shocked if the insect population loss is restricted to only 60% in the US. Of course that’s would also be only a subset of insects you would most commonly see around porch lights at night or grasshoppers generally. 40 years ago you couldn’t really walk into a grassy area without grasshoppers jumping everywhere. Or stand in one place and see several dozen within feet of you without trying. You didn’t even need to take bait with you to go fishing because it was too easy to catch a grasshopper at a moments notice. And the insects around porch lights at night could sometimes get so thick you had to be careful not to breath them in.