First, drink a glass of wine...that's for me
Second, on the main page of your country you can see all indexes of your country: Population, Finance, Education, etc...and Social Security; click on it and you will see in the Social Security page a white box labeled "Social Security Payments" and the link named "You can change the social security payments", and you will see that a good social security target is 80%.
Sorry for my Tarzan English. Cheers!