public static ArrayList<GameItem> getDropList(Npc npc) {
		ArrayList<GameItem> dropList = new ArrayList<GameItem>();
		for (SkillResource data : SkillResource.values()) {
			int percentage = Utils.random(100);
			int dropPercentage = -1;
			if (npc.getCombatLevel() > data.getMinLevel()) {
				int levelDifference = npc.getCombatLevel() - data.getMinLevel();
				int addPercentage = data.getBasePercentage() * (levelDifference/100);
				int newPercentage = data.getBasePercentage() + addPercentage;
				if (newPercentage > data.getMaxPercentage()) {
					dropPercentage = data.getMaxPercentage();
				} else {
					dropPercentage = newPercentage;
				}
			} else {
				dropPercentage = data.getBasePercentage();
			}
			if (percentage < dropPercentage) {
				for (int itemId : data.getItem()) {
					dropList.add(new GameItem(itemId, new Range(1, 5).getValue()));
				}
			}
		}

		return dropList;
	}