Russia's total reserves in the National Welfare Fund fell from 13 trillion rubles ($201 billion) to 11 trillion rubles (nearly $170 billion) in May compared to previous month, marking a 15.3% drop, according to a statement by the Russian Finance Ministry on Monday.
The volume corresponds to 8.3% of Russia's GDP, it said.
Western countries had frozen access to about half of the Russian central bank's reserves, worth about $630 billion, due to the ongoing Russia-Ukraine war that started on Feb. 24.
Elvira Nabiullina, the head of Russia's central bank, said on April 21 that the reserves in the National Welfare Fund could be used for investment.
Russia's total international reserves fell to $593 billion in April, a decrease of $13.3 billion compared to the previous month.
