A while back I ran a quick comparison of how well Canada's economy was growing relative the the U.S. economy by the Prime Minister in power at the time.

That told a VERY different story than the CCPA numbers.  Where in absolute growth rates Harper's tenure saw among the lowest of any PM, looking at Canadian economic growth rates relative to U.S. growth rates Harper's tenure was among the best.  Harper was one of a very small number of PMs that saw the Canadian economy grow faster than the U.S. economy during their time in power.