Minecraft wiki entry for Pillager, associated text: 0–1 Emerald (10⁄39 or 25.6%)
2–3 Emerald (5⁄39 or 12.8%)
4–5 Emerald (2⁄39 or 5.1%)
1 Enchanted Book (2⁄39 or 5.1%)
1 Iron Pickaxe (5⁄78 or 6.4%)
1 Iron Axe (5⁄78 or 6.4%)
1 Iron Shovel (5⁄78 or 6.4%)
1 Iron Sword (5⁄78 or 6.4%)
1 Iron Helmet (5⁄78 or 6.4%)
1 Iron Chestplate (5⁄78 or 6.4%)
1 Iron Leggings (5⁄78 or 6.4%)
1 Iron Boots (5⁄78 or 6.4%)