How accurate are A&G's polls?

ELECTIONA&G POLLACTUAL RESULT
2017-04-16 Anayasa Referandumu
Evet: 60.8%
Hayır: 39.2%
Evet: 51.41%
Hayır: 48.59%
2015-06-07 Genel Seçim
AK Parti: 42%
CHP: 27%
AK Parti: 40.87%
CHP: 24.96%
2015-11-01 Genel Seçim
AK Parti: 47.2%
CHP: 25.3%
AK Parti: 49.5%
CHP: 25.32%
2011-06-12 Genel Seçim
AK Parti: 44%
CHP: 31%
AK Parti: 49.83%
CHP: 25.98%
2010-09-12 Anayasa Referandumu
Evet: 50.7%
Hayır: 49.3%
Evet: 57.88%
Hayır: 42.12%