Definition: Debt-service (-to-exports) ratio
External debt - IMF
The ratio of debt service (interest and principal payments due) during a year, expressed as a percentage of exports (typically of goods and services) for that year. Forward-looking debt-service ratios require some forecast of export earnings. This ratio is considered to be a key indicator of a country’s debt burden.
International Monetary Fund (IMF), "External Debt Statistics: Guide for Compilers and Users; Appendix III. Glossary of External Debt Terms", Washington D.C., 2003