It’s nice to know we’re all going to live longer, unless you’re trying to terminate a DB plan.  But I’ll take the former.   
We’ve tweaked our annuity rate model and tightened the range from 20 BP to 10.  Always keep in mind our rates apply when a plan sponsor is actually purchasing a GAC not for a preliminary bid where an insurer throws out an artificially high price. 
We believe that the following rates applied to the mortality scale MP-2016 will give you a pretty good indication of the price of a group annuity contract. Use the smaller rate for small contracts.