(Bloomberg) -- Oman will need further measures to keep its budget deficit in check, its Finance Ministry said, after the Gulf nation tapped the international debt market with a $2 billion bond sale.

The shortfall may average 16% of gross domestic product over the next five years, or 5 billion rials ($13 billion) annually in 2021-2025, according to a document. S&P Global Ratings has previoulsy estimated that the budget deficit could hit 18% this year.

Public debt could soar to 130% of GDP in 2025, the Finance Ministry said. Total government debt is estimated to be 78.3% of GDP this year, rising to 85.8% in 2021, according to the International Monetary Fund.

Oman has been hammered by the coronavirus pandemic as well as lower crude prices, and has raised the possibility of assistance from its Gulf neighbors. The country is rated junk by all three agencies.

The government was facing increasing pressure to borrow abroad as a widening fiscal shortfall leaves the sovereign underfunded by about 1.3 billion rials to 1.4 billion rials, according to Morgan Stanley.

Read: Oman Dangles Bailout Card to Win Over Investors for Bonds

Oman has taken measures such as reducing spending and plans to impose a 5% value-added tax from next year. It plans to implement developmental projects valued at 371 million rials as part of the effort to redirect resources toward “national priorities,” state-run Oman News Agency reported.

Sultan Haitham Bin Tariq Al Said has also asked officials to set up a system to protect individuals and families most vulnerable to the nation’s budget plan.

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