Equatorial Guinea is holding a general election on Sunday in which President Teodoro Obiang Nguema, the world’s longest-serving president, is expected to extend his 43-year tenure as leader of the tiny West African oil-producing nation, Reuters reported.

More than 400,000 people have registered to vote in this country of about 1.5 million people.

Voters will also vote to elect 100 deputies, 55 of the country’s 70 senators and local mayors. No surprises are expected in the elections.

The longest-reigning president in the world has always been elected with 90% of the vote

Obiang, 80, has always been elected with more than 90 percent of the vote in elections whose fairness has been questioned by international observers amid complaints by human rights groups about a lack of political freedom.

He is running for a sixth term against two opposition candidates – Buenaventura Monsui Asumu, who is running for the sixth time against Obiang, and Andres Esono Ondo, who is running for the first time.

“The presidential election is completely devoid of tension,” said Maia Bovkon, senior Africa analyst at Verisk Maplecroft.

“Border closures and persecution and arrests of opposition supporters paved the way for Obiang’s 43-year rule to continue,” she said.

The United States and the European Union, in separate statements, called for free and fair elections and expressed concern over reports of harassment and intimidation of opposition and civil society groups.

The government denied this information, calling it interference in its election process.

A country that has only had two presidents so far

Since gaining independence from Spain in 1968, Equatorial Guinea has had only two presidents. Obiang ousted his uncle Francisco Macias Nguema in a 1979 coup.

Wrapping up his campaign on Friday, Obiang said he had decided to move the presidential election forward several months and hold it alongside legislative and municipal elections to save money due to the economic crisis.

Oil and gas production accounts for approximately three-quarters of this OPEC member country’s income. But production has fallen in recent years to about 93,000 barrels per day (b/d) from about 160,000 b/d in 2015 due to depletion of oil fields.