I was watching,or rather my dad was watching and I was present,an episode of Top Gear the other day.During said episode Richard Hammond was locked in a car and the car was dumped in a tank of water.

They said before he locked up in the car that more deaths by drowning had occurred over the past X years due to cars crashing and falling into water than on boating lakes.

And I thought:

Well yes,as boats do tend to float