Here’s another yield curve for your inspection and criticism! 
The CGI.PR.C are by far the longest-duration split-shares available and, it should be noted, have a DBRS credit rating of Pfd-1, very unusual for a split share corporation. I issued a press release on them when they were issued in February. They’re redeemable commencing in June, 2011 @ $26.00, declining annually to a price of $25 commencing June, 2015. They’re retractible at $25 commencing June, 2016.
The most liquid securities of the group are the WFS.PR.A and PIC.PR.A, with Average Trading Values of about $120,000 and $170,000, respectively.
For other information on these issues you can, as always, take a look at prefInfo.com.