Facts and figures about the Syrian refugee crisis:
Number of registered Syrian refugees:
3.9 million (expected to rise to 4.27 million by the end of 2015)
Of those, 1.76 million live in Turkey; 1.18 million in Lebanon; 627,000 in Jordan; 248,000 in Iraq and 134,000 in Egypt.
Funds requested by aid agencies and host governments for the refugee crisis in 2015:
$8.4 billion, including $5.5 billion to be spent outside Syria and $2.9 billion in Syria.
Of the $5.5 billion, more than $1 billion is a request by Jordan for direct budget support.
Funding pledges received at a donor country conference in March: $3.6 billion, 43 percent of the total requested.
Unemployment in the three districts of central and northern Jordan where three-quarters of the refugees live:
22.1 percent, up from 14.5 percent in 2011, when the refugee influx began, according to the International Labor Organization.
Overall unemployment in Lebanon, accord to the labor minister: 25 percent, up from 11 percent in 2011.
Jordan's population before the start of the Syria conflict:
Ratio of 628,000 registered Syrian refugees: close to 10 percent
Lebanon's population before the start of the Syria conflict:
Ratio of 1.2 million registered Syrian refugees: 26 percent