You don't like to adjust labors on your dwarves - profession proportions in your fort seem similar to those of migrants. With the exception you have too many miners and too few stoneworkers, which probably means that you were making some large excavating project and activated miner labor on some stoneworkers. Since mining skill raises really fast, some your stoneworkers are now displayed as miners.
You capped your population, but more children are born. Summer 258 - Autumn 259: 13 children were born (no migrants) but one grew up and became your new mayor.
You don't do trading. Very little exported wealth. Maybe caravans are getting destroyed, but more likely (soon explained why it's more likely) you just don't want to trade. Summer 258 - Autumn 259 you exported only 241$ worth of goods. Could be you sold a masterwork stone trinket and a seed. Or someone stole some junk (more likely). Imported wealth looks good, you are killing sieging factions, no survivors, and if a caravan isn't desroyed on its way, you seize most goods.
I think your architecture wealth is pretty high, or at least I always have problems with architecture
. I'd guess it's so high, because you made quite a few bridges (they require lots of materials, and have 2 quality modifiers).
Military. You didnt show any elites. You have only 1 squad activated at a time and 5 squads + militia commander total. Which means your dwarves are in fact untrained. But when in danger, you can activate all 45 soldiers and beat anything except sieges with no loses. During sieges you rely on your trap, which involves multiple bridges (mentioned earlier) and no magma (magma would destroy imported wealth). Probably you are just flinging and dropping enemies with your bridges many z-levels down. This would require lots of excavating, which explains, why did you need so many miners.
Food industry. You let all farmer/fisher/hunter immigrants do what they want which causes huge surplus of food. You are cooking it. Most of your wealth comes from cooked food. Lots of animals which produce even more food.
Cooked food is worth a lot, but your total wealth is still quite low as for 8-9 years old fortress. You don't have adamantine. At all. You probably dont even have good metal industry running. Only 9 metalworkers and too little total wealth. Most weapon and armor wealth comes from junk left by invaders, not from your metalworkers. You are porbably waiting (were waiting?) with metal industry until you hit magma. Except of making standard weapons and armor for military. Standard, because held/worn wealth is very low and you didnt train your metalworkers. And maybe even you gave some goblinite/humanite to your dwarves.
No magma and very little exported wealth could mean your fort is cluttered. A lot. Or you're using bridges (you have quite a few of them
) to atom smash garbage.
Your whole population was cave adapted until you built above ground farm...
Screen with water pump stack: we can see some blood, ichor and ichor mixed with blood. So it's surface or one of 3 caverns. Clusters of magnetite never lie deep, so it's surface or 1st cavern layer. Ichor could come from giant desert scorpions (surface), giant cave spiders (1st cavern) or FB, or even something else, so it's not going to tell whether its surface or 1st cavern. You had a little flood there, because something's growing in the middle of magnetite cluster (you probably forgot that liquids can flow diagonally). Looks like you have 5 pumps per z-level pumpstack, which requires a lot of power. And you managed to get that power.