And attendance has steadily increased every year since, with over 3,800 participants in 2011.
Over 2,000 participants from 100 countries and 17 international organizations attended the Congress.
The organization has grown to serve over 2,000 participants a year.
It was held again on 27 July 2002, and has since become an annual event, drawing over 1000 participants in 2012.
According to the Association, the annual convention draws over 1,000 participants.
As of 2010, the association has nearly 500 member groups representing over 25,000 participants and 18,000 volunteers.
Events in recent years had over 1 million participants.
The event has in the past had over 700 participants.
In 2004, there were over 25,000 participants outside of Australia.
This climate neutral conference brought together over 1,000 participants from 58 countries.