1. Arab Barometer Data, Wave I, 2007, available at www.arabbarometer.org.
2. – Wave ii, 2011, available at www.arabbarometer.org.
3. – Wave iii, 2013, available at www.arabbarometer.org.
4. – Wave iv, 2016, available at www.arabbarometer.org.
5. – Wave v, 2018, available at www.arabbarometer.org.