(CNN)The number of refugees who have entered Europe by sea and land this year has passed 1 million, the International Organization for Migration said Tuesday.
The latest updates for so-called “irregular arrivals” into Europe in 2015 as of Monday put the total number at 1,005,504, according to the organization.
The vast majority — 971,289 — have come by sea, according to the figures. Another 34,215 have traveled over land.
Among those traveling by sea, 3,695 are known to have drowned or remain missing as they attempted to cross the sea on unseaworthy boats, according to IOM figures.
The IOM’s director general William Lacy Swing has called the Mediterranean “the deadliest route for migrants on our planet.” The 3,279 people who lost their lives attempting to cross it in 2014 accounted for 65% of all migrant deaths that year.
By contrast, there have been 6,029 deaths between 1998 and 2013 along the second-deadliest border, the U.S.-Mexico border, the organization said.