"People in their mid-20s and early 70s are the most satisfied with their lives, while those around 50 have the lowest life satisfaction levels, according to the Bureau of Statistics' measure of progress report.
People tend to be less content in their 30s, 40s and 50s than other age group, apart from the very old, it found..."
W: http://www.smh.com.au/articles/2006/05/24/1148150330929.html