Criminals using more inventive shipping methods and unregulated drug derivatives are pushing the figures on Australia's illegal drug trade to record levels.
The Australian Crime Commission (ACC) counted 69,595 drug seizures in 2010/11, an increase of 43 per cent from 10 years before.
The number of busts is unprecedented during the decade of monitoring, but the amounts seized have been in decline, falling more than 30 per cent in the decade.
ACC chief executive John Lawler says this could point to greater use of the postal system by smugglers. "What criminals will look to do is to minimise risk," he said at the launch of the ACC's Illicit Drug Data Report 2010-11.
"And if they have small amounts with frequency, the chances are some of these packages will get through."