Between 2014 and 2019 Venezuela experienced the "sharpest" foreign exchange losses in its history, Maduro said.
"In six years we lost 99% of our foreign exchange revenues."
He added that the main reason for the huge drop in revenues was "the war declared on oil prices," to "attack the world's major producers," and said his country's economy and finances were being targeted.
Experts recognize sanctions have exacerbated the crisis in Venezuela, but say the main problem is poor economic management and corruption.
A July report from private company Envoci said that in 2019 about 96 percent of households lived in poverty, up from about 92.6 percent the year before.