Well, before this period of turbulence beginning in August 2007, the Bank of Canada was not providing any extraordinary liquidity. It did provide liquidity on the normal basis, which helps banks essentially settle their cheque clearing and other things, but it wasn't doing anything out of the ordinary. This began after what we called the financial “turbulence” then, “crisis” now, began in August 2007, and has been ramping up and peaked. The usage of these extraordinary facilities by financial institutions peaked in the fall, not long after the failure of Lehman Brothers, and has since been receding to some extent.
On March 3rd, 2009. See this statement in context.