But that's moving the goalposts, Europe has a bunch of countries with small populations, Sweden is 16th in population from 40+ countries. Aside from Germany, Italy, the UK, France, Spain and Poland all the other countries will hover +- ~10 million people compared to Sweden. It's smack in the median of population size in Europe.
In all fairness, Sweden isn't exactly doing remarkably well either. It's fertility rate is still well below replacement level. It's still in terminal decline. Just a tad slower than its peers.