Pick one of the following, or make your own...
The best indicator that peak-oil has occurred is;
1. World oil production is flat for two years.
2. Human population growth hits zero.
3. World GDP growth hits zero.
4. peakoil.com achieves 1,000,000 members.
5. The first item on a mainstream news channel is peak-oil.
6. Saudi Arabia fails to increase oil production after the West demands that it does.