I voted England cuz from the point of view of my countrymen, apparently its the UK... UK girls make up a large chunk of white women dating Filipino guys in the Philippines - I observe this when I go out and I usually have an ear for accents since I've grown up around different nationalities and cultures and I have been doing so since 3 years ago... Plus I know a number of those girls personally.

And when I see the wedding pages in a newspaper or magazine locally, if I see a notice of a white woman marrying a Filipino guy - the girl also tends to be British...
Anyways they're not the only ones - nationalities like the Germans, French, Spanish, Swiss, as well as a sprinkling of others like Scandinavians, etc do so too...