@Gunman Hard to really give 'average' stats for serfs given that the stats for the quest are very focused on being a senior naval officer and it is hard to describe averages for vast swathes of the population.
An 'average' soldier of a low tech or poor world who is a professional combatent with proper training but does not have any augmentation would probably be something like Prowess 5 though.
@LonelyWolf999 Basically the first waves of colonies were all slower than light and most polities have grown out from those original STL colonisation efforts. By the time FTL travel became a thing and people made contact back with the solar system this had happened and the Earth Sphere is almost completely isolationist. They effectively collect important artefacts that they presumably want to put in museums in return for fantastically expensive trinkets and materials like the emeralds used in your most fancy medal. Which are regular emeralds, they are just from Earth! Things like their intervention in the NASP war were probably carried out by groups about as relevant to them internally as say, Sea Shepard, the whaling protesters.
Normal dividend payment for a single share would be equivalent to one Wealth a quarter but this is suspended during times of crisis, as defined by the Empress. They only started paying out dividends last year in the wake of the war did so because of immense political pressure not because it was necessarily a good time for it.
Population wise there are actually very, very few nobles, you are only an real noble if you hold a share or the head of your immediate family holds a share. If you look at your fleet and officers you might notice that there is a baronet, a baroness and Lord Commander Jeffry Asim Grigonz, everyone else noble being a 'sir' or 'dame' for title. Commander Grigonz personally holds a single share, Baroness Scolly has six, your XO Baronet Rownett probably has two or three. All of the other noble officers are either the children of a share holder or married to one but do not hold shares themselves.
If I was to detail the far more numerous lieutenant commanders, lieutenants, midshipmen/women and marine officers then you would see a lot more people without any kind of noble title. Probably a third of the lowest ranking officers are people like yourself, commoners who excelled and were commissioned, most of the rest would be peripheral members of noble families, cousins and grandchildren of actual lords and ladies, lacking any kind of immediate familial access to a share. Also a few younger versions of your current senior officers. Even if you have a share you do normally need to work through the ranks, unless you have direct ducal or imperial sponsorship, it is just faster and more certain because of your status, wealth, and obviously, superior breeding.
The practise is very much to keep shares centralised. Very high ranked nobles might leave single shares to heirs other than the first child but pure primogeniture is the rule when it comes to share inheritance. Other wealth tends to be split more evenly but the edges of extended family very quickly drop out of being considered nobles.
That is where most new nobles come from though, very wealthy non nobles who are still parts of extended families and manage to build up their riches to where they can buy a share. Meritocracy! This grey area is technically where you sit on the social totem pole but you are not a product of noble family genetic enhancement and so do not 'look the part' or 'talk the talk'.
These people are a tiny proportion of the population though, less than one percent. You then have about eight percent of the population who are not in debt bondage but still very much commoners. Doctors who are 40+ and frugal, or have parents who were also doctors, senior management in private or government owned corporations, long service military veterans, university professors, etc. A high proportion of these people are from families who have had the same kind of status, it is much easier to keep out of debt bondage when it is generational, but the moment somebody does not manage to get a very lucrative career or put a few decades into the military, that is it, welcome to a family line falling back into serfdom.
There are tiers there of course, serfs who are literally working on Space Latifundi or Space Mines are significantly worse off than serfs who are primary school teachers, or lawyers. They do however work for (or are contracted out by) the person or entity they owe money to and it is a tar pit extremely difficult to get out of.
The official story of course points to the planets that are Space North Korea x8 as an example of why the Imperial system is far superior.