How long has the al-saud family ruled Saudi Arabia?

The Al Saud family has ruled Saudi Arabia since the establishment of the modern state in 1932, when Abdulaziz Ibn Saud unified the various regions into the Kingdom of Saudi Arabia. This means they have been in power for over 90 years. The family's rule has been characterized by significant social, economic, and political changes, especially following the discovery of oil in the 1930s.