(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