The Greek passport ranked in the top five strongest in the world for a second year in a row, according to the annual Henley Passport Index. This means people holding a Greek passport can travel to 187 countries.

The Singaporean passport was at the top of the list for a second consecutive year, breaking last year’s six-nation tie when it shared the most powerful label with Italy, Spain, Germany, Japan, and France. Having a Singaporean passport will grant someone access to 193 countries.

In this year’s list, Japan and South Korea share the second spot, followed by a three-way tie between Denmark, Finland, and Ireland.

The Henley Passport Index assesses the strength of a country’s passport globally based on a single metric: the number of countries the travel document can be used in without the need for a visa. The ranking uses data provided by the International Air Transport Association (IATA).

While Greece might be 5th on the Henley Passport Index, which measures the freedom of travel, according to the Nomad Passport Index, which incorporates five criteria to rank passports, including taxation, the eastern Mediterranean nation comes in second.

The latest Henley Passport Index reveals a slight decline in the power of both the U.S. and U.K. passports, continuing a long-term downward trend.

The American passport dropped to 10th place, down from 9th in the previous ranking. Meanwhile, the U.K. passport fell to sixth place from fifth, according to data released by Henley & Partners.

The firm noted that this shift reflects an ongoing “long-term downward trend” for both countries, which were once regarded as holding the most powerful passports in the world.