Canada average salary

The average after tax salary of a family of two, where only one is working is 64k which is around 90K before tax acc. to

http://www.statcan.gc.ca/tables-tabl...mil21a-eng.htm

The sounds a bit too high. How does stats can collect data? Is it reliable?

And what does that "No Earner" row mean? Some of them have more after tax income than me ...lol.