SAN FRANCISCO – Equifax is offering a closer look at its massive data breach, which revealed sensitive information on more than half the American population last year.

The company released the details Monday in a Securities and Exchange Commission filing, following demands from US senators.

The credit-monitoring company, which gathers personal information on people without being required to notify them, has provided some details in the past about the breach, including that 146.6 million Americans were affected and that their Social Security numbers, names, birthdates and addresses were stolen.

Here is the breakdown from Equifax on how many people were affected by category:

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