According to Wards Automotive, these are the manual transmission "take rates" for model year 2015 in the U.S. (the most recent figures available), for the vehicles mentioned in this thread:
Ford Fiesta - 20.0%
Jaguar F-Type - nil
Mazda MX-5 - 49.0%
Porsche 911 - 46.3%
Scion FR-S - 41.6%
Subaru BRZ - 35.5%
Subaru Impreza - 25.0%
Forester - 2.0%
Subaru Legacy - nil
Subaru Outback - nil
Subaru WRX - 62.0%
Subaru XV Crosstrek - 3.0%
VW Golf - 27.9%
VW GTI - 22.6%
VW Passat - 14.2%
The highest take rate is for the Dodge Viper at 100.0%.
I don't know of any similar source for Canadian stats/sales breakdown.