The article I linked to explains the significance, which I tried to sum up in my comment:
> In other words, excess mortality from COVID-19 may be less conspicuous than previously perceived in Sweden, while mortality displacement may be used to explain at least part of the observed findings.
> More specifically, mortality displacement implies temporarily increased mortality (i.e., excess mortality) in a certain population as a result of external events, which likely arises because individuals in vulnerable groups die weeks or months earlier than they would otherwise – primarily due to the timing or severity of the unusual external event. The excess mortality is, thus, predated or followed by time periods of lower than expected mortality.
In other words, Sweden was better than Norway at keeping older people alive before the pandemic. Therefore during the pandemic there were more older people in Sweden. Older people are notably more vulnerable. This may be the explanation why more people died of covid in Sweden. It alludes to there being more factors involved than just the nearness of two countries and lockdown protocols.
Another way of saying this, exaggerated for clarity: More people will die of covid in a country of 80 year olds than in a country of 20 year olds.
Remember that only 1 out of 695 people have dies from covid in Sweden since the start of the pandemic [0], two thirds of them over 80 years old [1]. This is consistent with the above information.
[0] https://www.worldometers.info/coronavirus/
[1] https://www.statista.com/statistics/1107913/number-of-corona...
The excess mortality graph only goes back 19 months, because that's when COVID start. It uses excess mortality, so those numbers are based on numbers in the previous years.
It's like looking at a chart showing inflation over the past year and saying "this says nothing about the prices two years ago!" They're used to compute the numbers on the chart, not be shown on the chart.