I want to know the answer to the following question:
What has happened to debt external onus  in Swaziland in the past two decades?
All the background I'm provided with is that "On the positive side, the external debt burden has declined markedly over the last 20 years, and domestic debt is almost negligible; external debt as a percent of GDP was less than 20% in 2006.". Is that enough to answer the question?
Answer: yes