Iceland makes it five years in a row as the country where men and women are most likely to have equality of opportunity, a new report says.

According to a study out Friday on the global gender gap, Iceland held the top spot among the 136 nations surveyed by the World Economic Forum. Iceland claimed the No. 1 ranking in 2009, when it moved up from a No. 4 showing in the surveys between 2006 and 2008.

The rankings are based on measures in four areas: economics, education, health and politics. Rounding out the top five nations are Finland, Norway, Sweden and the Philippines. The U.S. placed 23rd, just below its 22nd ranking in last year’s survey. That put it behind Canada (20th), Luxembourg (21st) and Burundi (22nd), but ahead of Australia (24th), Ecuador (25th) and Mozambique (26th).

The countries with the most gender inequality were Syria, Chad, Pakistan and Yemen, ranked 133rd through 136th, respectively.

More than half the countries surveyed made progress in narrowing their gender gaps, the authors said, thanks largely to women’s gains in politics and education.