What fraction of oil transported is spilled by pipelines?

In the context of BC requirements for new oil pipelines, I came across a story arguing that oil spills are the norm, not the exception:

In 2010 alone, he observes, pipelines in Alberta carrying either oil or some combination of oil, gas or distillates failed on average every 1.4 days and they spilled roughly 3.4 million litres of oil.

Sounds bad, but just how big a fraction of what's transported is that? Looking up numbers (2010 figures generally) it seems as though Alberta produces 525000 bbl/day of oil and over 1.6 million bbl/day from the oilsands. Add to this 4.1 trillion cubic feet of natural gas in 2010. So far now I'll assume that there's 2.125 million bbl / day of oilish stuff flowing through pipelines (which might double-count some stuff, but doesn't figure in the natural gas). Discover that a barrel of oil (bbl) is about 159L and run the math.

Looks like about 3/1000s of a percent (i.e. 3/100000ths of oil was getting spilled on an annual basis). That'd be comparable to spilling about 1 millilitre when pumping 40L of gas into your vehicle. It's also a rate less than 1/3 that of auto-related deaths as a proportion of the population.