Editor’s Note: This story first published on Sept. 11, 2015. It was updated with more recent figures on April 18, 2016.

CNN  — 

Imagine every man, woman and child leaving home in 29 states, mostly in the U.S. West and Midwest. That’s everyone west of Ohio and Kentucky and north of Texas, all the way to California.

The 158 million people in those states make up the same share of the U.S. population – 49% – as the proportion of Syrians that have fled carnage there.

The war in Syria is so hellish and unrelenting that more people have left that country than any other in recent years. One of every five displaced persons in the world is Syrian.

Here’s a look at where those Syrians have gone.

War has displaced half of all people in Syria

Protests against the government in Syria in 2011 soon devolved into chaotic war. The fighting and later rise of ISIS had forced 10.6 million people from home by late 2015 – about half of Syria’s pre-war population.

A refugee from Syria prays after arriving on the shores of the Greek island of Lesbos aboard an inflatable dinghy across the Aegean Sea from from Turkey on September 7, 2015. Greece sent troops and police reinforcements on September 6 to Lesbos after renewed clashes between police and migrants, the public broadcaster said, while Syrian refugees on the island were targeted with Molotov cocktail attacks. More than 230,000 people have landed on Greek shores this year and the numbers have soared in recent weeks as people seek to take advantage of the calm summer weather. AFP PHOTO / ANGELOS TZORTZINIS        (Photo credit should read ANGELOS TZORTZINIS/AFP/Getty Images)
The refugee crisis ... from the Syrian war to now
01:55 - Source: CNN

Most have fled to countries near Syria

Most Syrians who have left their homeland registered as refugees with the United Nations. Three in four Syrian refugees did that in Turkey, Lebanon or Jordan, according to UN figures from February 2016.

More of them have gone to Europe

The number of Syrians seeking safety in Europe more than doubled from 2014 to 2015. Many left Turkey and other countries for Europe to ask for asylum, a status that allows someone to live and work legally in another country.

They’re not the only ones

Worldwide, 59.5 million people are on the move as refugees or displaced people within their home countries. That population would be enough to make them citizens of the world’s 24th biggest country.

Humanity has never seen such displacement. Ever.

“Wars, conflict and persecution have forced more people than at any other time since records began to flee their homes and seek refuge and safety elsewhere,” the United Nations said in June.

At least 15 wars and conflicts are to blame – in Africa, the Mideast and Asia.

Three out of five Syrians seeking asylum in Europe are in Germany, Sweden or Serbia. Relatively large numbers of Syrians also have sought asylum in Hungary, Austria, Bulgaria, the Netherlands and Denmark.

Among the European countries receiving the fewest asylum requests are Latvia, Estonia, Lithuania, Slovakia and Iceland.

Hardly any have found refuge in wealthy Gulf states

Gulf states such as Saudi Arabia, Qatar, Kuwait and Bahrain have been criticized for resettling no Syrian refugees despite similarities of language, religion and culture.

Human rights groups say the Gulf states, their wealth reflected in skyscrapers and upscale shopping malls, have plenty of resources to resettle Syrian refugees. Some in the Gulf states point out that they have contributed tens of millions of dollars in humanitarian relief for displaced Syrians.

The United Arab Emirates, on the other hand, has been welcoming, receiving and extending residency permits to more than 100,000 Syrian nationals since 2011, a UAE government source told CNN.

Read how Persian Gulf neighbors close their doors to refugees

In this Thursday, Sept. 10, 2015 photo, a Jordanian soldier carries a Syrian child arriving in Jordanian territory in the Roqban reception point near the northeastern Jordanian border with Syria, and Iraq, near the town of Ruwaished, 240 km (149 miles) east of Amman. The commander of Jordan's Border Guard told The Associated Press that 199 refugees crossed from Syria into Jordan on Thursday. (AP Photo/Raad Adayleh)
Gulf states offer little support to migrants
02:49 - Source: CNN

The United States is resettling more Syrian refugees

The United States has resettled 1,500 Syrian refugees since the start of the conflict in 2011, the vast majority of them this year.

That amounts to about 0.03% of Syria’s 4.1 million refugees.

Here’s a breakdown: 23 in 2011, 41 in 2012, 45 in 2013, 249 in 2014 and 1,199 so far this fiscal year, which ends September 30, according to the State Department.

About 300 more refugees are expected to be admitted by the end of the month, according to U.S. officials.

In the face of growing questions about such small numbers, President Barack Obama ordered his administration to “scale up” the number of Syrian refugees – at least 10,000 in the next fiscal year.

Syrian women wait in line to receive aid from an Islamic relief agency at a refugee camp in the town of Ketermaya, north of the port city of Sidon, Lebanon, Monday, Sept. 7, 2015. There are some 1.2 million registered Syrian refugees in Lebanon, many of them living in flimsy tents scattered across the country. (AP Photo/Bilal Hussein)
White House: U.S. to take at least 10,000 more refugees
02:55 - Source: CNN

CNN’s Janette Gagnon, Beth Brettingham, Richard Allen Greene and Aaron Darveniza contributed to this story.