1. "Sunnis make up 74%[1] of the total,"
source:
http://en.wikipedia.org/wiki/Islam_in_Syria
2. "Syria's population is approximately 90% Muslim and 10% Christian. Among Muslims, 74% are Sunni; the rest are divided among other Muslim sects, mainly Alawites (accounting for 10% of the total population) and Druze (6%), but also a small number of non-Druze Ismailites and Shiite, which has increased dramatically due to the influx of Iraqi refugees since 2005"
http://www.cometosyria.com/en/pages/Religion+syria/6/1
3. "The largest religious group in Syria is Sunni Islam, of which about 80 percent are native Syrian Arabs"
http://www.sacred-destinations.com/syria/syria-religion