The migrant crisis in Europe and the Middle East lurches from one drama to the next by the day. First it's a rickety boat floundering in the Mediterranean. Next it's a new surge of migrants landing on European shores. Suddenly it's thousands of refugees stranded in an unwelcoming Hungary.
The numbers are also changing by the day. Here's a snapshot of the best and most recent figures as this unfolds:
4.1 Million: The number of Syrians who have fled their country since the country's civil war began in 2011. These Syrians are the focus of the refugee crisis in the Middle East and in Europe.
In addition, an estimated 7.6 million Syrians have been displaced inside their homeland. Combine these two groups and it means that just over half of Syria's 23 million people have fled or been driven from their homes since the war began, a strikingly high figure for any war.
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