Globalization of Science?

This new report finds:

[o]ver 10% of the world's scholarly articles come out of China. The report projects that the country will pass the United States, which currently produces 21% of the world's research papers, within the decade. 

Llewellyn Smith said that the most surprising finding of the Royal Society report was strong scientific growth in a group of countries not perceived as research powerhouses. Iran, for instance, has increased its yearly number of peer-reviewed science publications from 736 in 1996 to 13,238 in 2008. Turkey tripled the percentage of its GDP spent on R&D in a little over a decade, and the number of researchers in the country increased by 43%, a finding that may add clout to its long-pending bid to join the European Union. Tunisia and Qatar also showed significant increases in research spending . . . 

A cool dynamic graph is here.
The complete report is here
Source

I wonder what the correlation is between GDP per capital and peer review publications.