Hola Oscar,
I would be interested in making the same (or similar) study or research on the impact of Covid-19 in Spain.
As I have seen, part of your post is written in Spanish (in both English and Spanish, good idea); so, I guess you know the reason of my answer. Here, in Spain, we are facing a tough and acid issue between what is being officially said by the government and the data which is being arguing (handled) by many other first line institutions, and persons.
Here, some significant part of the Spanish population, as well as important institutions and social agents, are asking the government for credible figures and useful segmentations of the casualties induced by the virus, just for us to be able to deal with the next wave of the disease .
The government is negating about 56% of the deaths produced by the pandemic (28,385 officially acknowledged fatal casualties versus nearly 50,000 cases collected by the burial and cremation sector, among others).
Perhaps your study could help to some people here in approximate the true situation; however, in any case, we would have serious difficulties in collecting the accurate data you seem to have got directly, I suppose, from the Swedish authorities.
Do you have any access to this information in Spain?