I live in Finland (5 million habitants) and based on my research only about 5% of job ads include salary. It's not part of the culture to discuss salaries publicly so it's very well possible that companies won't be willing to go public.
On the other hand, I think it's quite promising that there are even a few companies that are already publishing their salary offers, despite most of the competition not doing it.
I see it as my job to convince them it's good for their business and start a little revolution. Maybe others will join the bandwagon?