The amount of money raised through new public listings of Australian companies has plunged 93 per cent over the past six months.

A PricewaterhouseCoopers survey shows only 21 initial public offerings (IPOs) were made in the first half of 2008, raising $334 million.

This compares with 33 IPOs, raising $4.5 billion, over the same period last year. The survey excludes resources, compliance and backdoor listings.

How much is the difference between 4.5 billion and 334 million? Go figure it out.