Courtesy of YYZ News...

"Air Transport World magazine have recently published their annual statistics showing the world's top 25 airlnes and the world's top 50 airports. These stats are in the July issue of ATW. Air Canada ranked 16th in terms of passengers carried and 14th place expressed in RPK's (revenue passenger kilometers). The RPK column shows the following airlines from top to bottom; UA/AA/DL/NW/BA/CO/AF/LH/JL/US/WN/SQ/QF/AC/KL/NH/CX/TG/IB/KE/MH/AZ/SR/TW/HP.
The top 50 airports in the world expressed in passengers processed are shown below;
ATL/ORD/LAX/LHR/HND/DFW/FRA/CDG/AMS/DEN/PHX/LAS/MSP/IAH/SFO/MAD/HKG/DTW/MIA/LGW/BKK/EWR
JFK/MCO/SIN/YYZ/SEA/STL/FCO/NRT/SYD/BOS/PEK/PHL/MUC/CLT/ORY/SEL/LGA/HNL/ZRH/BCN/MEX/BWI/PIT
BRU/MAN/KIX/PMI/SLC."

Note that YYZ ranks 26th top airport just after Changi. I don't know what the criteria were