Like all "stats" if you don't know how to use them within in the correct factual context, they aren't worth very much at all. In fact, sans proper context, stats are often outright misleading.
For example, in the time that Sweden's "stats" started to increase at the start of the northern hemisphere winter, so from the end of August as you graph shows, the number of Covid cases and Covid-related deaths - on a per capita basis - for the countries making up the EU are, respectively, 84% and 120% times higher than the number of per capita cases and per capita deaths in Sweden.
Specifically, since the end of August, per capita cases in the EU (ex-Sweden) are 1,633 per 100,000 citizens, compared to Sweden's 885 cases per 100,000 Swedes.
And, in terms of Covid-related deaths, the EU-ex Sweden is at 15.5 deaths per 100,000 citizens, compared to Sweden's 3.5 deaths per 100,000 citizens.
In terms of the deaths per capita, going into the northern hemisphere winter, Sweden is currently ranked 4th-lowest out of the 20 EU countries, lower even than countries who are locking down once again, such as France (20.3 deaths per 100,000 citizens), Switzerland (16.4 deaths/100k), UK (14.4 deaths/100k), Austria (10.3 deaths/100k) and Ireland (4.0 deaths/100k).
