David Beers (formerly of the Bank of Canada, now at the Bank of England) and Jamshid Mavalwalla (Bank of Canada) have produced an update (PDF) to a database (Excel) of sovereign defaults. Coverage now extends from 1970 to 2015. The database shows, country by country and for all countries combined, who was in default, by how much, and to what groups (IMF, World Bank, Paris Club countries, foreign currency bond holders, etc.)
Another useful feature of the database is that it has a score showing how reliable the data are, in the authors’ view. It is all too often forgotten in economics, especially when comparing or combining figures across countries, that the underlying data may vary widely in their reliability, sometimes because of outright falsification, but more usually because of difficulties in measurement. Pointing out where data are of lower quality can spur researchers to go out and find better data or more accurate ways of estimation for filling in gaps.
(Thanks to David Beers for bringing the database to my attention.)