Thor 2 fell -41.9% in its second weekend in Bulgaria and is already at 90% of Thor's 1 gross and has another weekend with nothing big opening before THG2.
Some other interesting facts from looking at BOM:
In Colombia it had two weekends with national holidays on Monday, but fell just 14% on it's second while loosing 14% of it screens to 3 new releases. It had the second smallest drop in the top 10.
In Malaysia Thor 2 is already the 4th highest grossing movie of 2013, soon to become 3rd. Iron Man 3 and Fast & Furious 6 are 1st and 2nd.
In Mexico it fell 46%, compared to 55% for Thor 1 [a note, that was when Fast 5 opened] and 54% for Iron Man 3, and has already made 80% of Thor's 1 total. Mexico's was Thor's 1 third biggest OS market after UK and Australia.
In Slovakia its opening weekend gross was 99% of Thor's 1 total.
Thor's 2 gross after its second weekend has already surpassed Thor's 1 total in these OS markets:
Austria
Brazil
Bulgaria
Colombia
Finland
Hong Kong
India
Malaysia
Philippines
Russia [according to what is announced on this board's Russia's tread]
Singapore
Thailand
In many other territories it's at 95%+ of Thor's 1 total gross like UK, South Korea etc.