I'd just like to point out that raising 6 kids is very much hard work, even if you're a bad parent I find it hard to describe it as no work at all.

Your data shows that the trend of abortion in Sweden is stable since the 70s. So, no, there is no correlation between abortion and a decrease in birth rates.

Exactly. People seem to forget why birthrates were so high in the past. It is not just lack of abortion (which happened), but the fact that more children would provide additional help in the daily farm work. In other words, it was very cheap ho have children and the financial benefit existed. In a post-industrial society, these incentives are reversed. It is very expensive to have children, and there are no financial incentives. That's why we have the declining birth rates everywhere we have an economically developed society.