Basically, even taking that graph back into the 1980s, it's very much a recent phenomenon. Productivity over long periods of time is quite comparable in Canada and the U.S. So this gap that's opened up is remarkable.
It appears to be motivated by two things. On the one hand, the U.S. went through a recession in 2001 that we didn't, and they had to grapple with a high exchange rate earlier than Canada. So they've had very large productivity gains for a long time now, particularly in the manufacturing sector.
At the same time, our productivity, as you can see, levelled off in recent years, and in fact it was basically flat in 2003 and 2004 and began to increase last year.