Artifact Knowledge percentage gains per level (World of Warcraft: Legion)

The Artifact Knowledge increases the amount of Artifact Power you get from using items, and each level has an increased percentage gain. This means that each level will be based on the following level, and get higher exponentially. For example, reaching level 25 increases the Artifact Power gains by a wooping 24,900 %, so an item that originally awards 400 Artifact Power actually gives 99,600 Artifact Power at this level. This means that in a few months time, you will begin to see very large Artifact Power gains by doing World Quests and finding the AP increase items.

And by the way: items you already obtained will not increase once you reach a new Artifact Knowledge level, so there is no point in saving them up for later 

Anyway, below is the table that tells you how much increase you get per level:
1: 25 %
2: 50 %
3: 90 %
4: 140 %
5: 200 %
6: 275 %
7: 375 %
8: 500 %
9: 650 %
10: 850 %
11: 1,100 %
12: 1,400 %
13: 1,775 %
14: 2,250 %
15: 2,850 %
16: 3,600 %
17: 4,550 %
18: 5,700 %
19: 7,200 %
20: 9,000 %
21: 11,300 %
22: 14,200 %
23: 17,800 %
24: 22,300 %
25: 24,900 %

So you better get the Artifact Knowledge work orders ready as soon as possible, because this is severely gonna affect your future AP gains!

Lore Page increased by getting Artifact Knowledge

The higher Artifact Knowledge you get, the more lore pages you unlock for your Artifact Weapon. Below you can see at what Artifact Knowledge level you unlock each page:
Page 1: Artifact Knowledge level 1
Page 2: Artifact Knowledge level 3
Page 3: Artifact Knowledge level 5
Page 4: Artifact Knowledge level 7
Page 5: Artifact Knowledge level 10
Page 6: Artifact Knowledge level 12
Page 7: Artifact Knowledge level 15
Page 8: Artifact Knowledge level 18
Page 9: Artifact Knowledge level 20
Page 10: Artifact Knowledge level 23