GUANTANAMO BAY NAVAL BASE, Cuba: More than a dozen years after the first 20 detainees arrived at Guantanamo Bay on Jan. 11, 2002, the US military prison still houses 154 men out of a total 779 held here over the years.

The following are facts about the Guantanamo inmate population:

• The remaining inmates represent less than a quarter of the 680 incarcerated at the same time in 2003, when the prison population was at its peak. While they hail from about 20 countries, more than half are from Yemen. Afghans, Algerians and Saudis are the other most represented nationalities.

• Seventy-six detainees have been approved for transfer by the US military, which means that, at least in theory, they can be released. But with no one willing to take them in, they remain behind bars.

• More than 600 inmates have been repatriated or transferred to other countries. According to the Pentagon, about 25 percent have resumed or are suspected of having resumed terror-related activities since their release.

• Transfers have picked up in recent months. The most recent have been to Algeria, Saudi Arabia and Sudan. The last three ethnic Uighurs, Turkic-speaking and mainly Muslim Chinese citizens, were sent to Slovakia in December. Talks to take in detainees are under way with Brazil, Colombia, Germany and Uruguay.

• Forty-five detainees have not been approved for transfer because they are deemed too dangerous, but cannot be prosecuted due to a lack of evidence against them. The cases of three among them are currently being looked at by a “Periodic Review Board” created by President Barack Obama in 2011 as part of his efforts to shutter the facility. About 20 others may be charged.

• Nine detainees have died. The most recent, Yemeni national Adnan Abdul Latif, probably committed suicide in September 2012.

• Eight detainees have been tried and convicted since the creation of special military commissions in 2006. Six of these inmates pleaded guilty. Federal authorities reversed the convictions of two of them, while appeals have been filed in two other cases. The remaining four were transferred back to their home countries.

Only one, Tanzanian national Ahmed al-Ghailani, who is serving a life sentence for his role in the 1998 attacks on US embassies in Africa, appeared before a federal court.

• Six detainees were sent before a military commission, including Khalid Sheikh Mohammed, the self-proclaimed 9/11 mastermind and four others suspected of involvement in the terror attacks on US soil.

Another is Saudi detainee Abd Al-Rahim Al-Nashiri, who is charged with masterminding the MV Limburg attack and the 2000 attack against the USS Cole in Yemen. All six face the death penalty if convicted.