Add to current or increase Statistics Upgrade levels:

Items that would be of interest:
Level Stats: Session duration played on each level, preferred each time.
Level Stats: Estimated AP per day based on new AP value and previous session duration.
Mine Stats: Profit per second.
Mine Stats: Upgrading profit per second increase.
Mine Stats: Session duration required to self pay off upgrade.
Recipe Stats: Quantity required, including within recipes.
Recipe Stats: How many currently owned.
Crafting Stats: How many items could be crafted and sustained based on current smelters.
Crafting Stats: How many items could be crafted and sustained based on current mine production.
Smelting Stats: How many alloys could be smelted and sustained based on current mine production.
Army Stats: How many armies required to conquer all territories revealed.
Army Stats: How many armies available for purchase and total cost.