"If you can do simple math, you're a Nazi."
Putting your inane non-argument aside:
The suicide rate in London is 9 per 100,000.
London has a population of 8.3mm.
About 8% of Londoners work in financial services.
Therefore someone who knew math would expect about 60 suicides in the London financial sector every year, perhaps more given how stressful the sector can be.