Accounting giant Deloitte Touche Tohmatsu increased revenue by 3.5 per cent last year, its fourth consecutive annual increase.

Turnover came in at US$32.4 billion (S$41.2 billion) for the 12 months to May 31, driven by higher demand across all its services.

Global chief executive Barry Salzberg said in a statement yesterday: "Despite major economic fluctuations in some regions, clients are seeking the full range of (the company's) services and advice as they invest in innovation and other catalysts of growth."

Deloitte said it has focused on hiring, retaining and training.

It hired 51,400 people in the 12 months, bringing the total workforce to more than 200,000.

The group, whose headquarters is in the United States, had previously announced its target of employing 250,000 staff by 2015.

The Americas contributed about 50.5 per cent of Deloitte's revenue, while Europe, the Middle East and Africa accounted for 34.4 per cent.

The Asia-Pacific region made up the remaining 15.1 per cent.

Its audit and enterprise risk services arm was the biggest contributor of revenue among the firm's four business functions.

But the consulting services division recorded the highest revenue growth of 7.1 per cent to US$10.4 billion.

This signalled the willingness of companies to explore and invest in business opportunities, said Deloitte.