Very nice car!
I cannot help with worldwide production but for UK.......
From Department for Transport - Cars registered for the first time by make and model
From Q1 2016 to Q1 2018 there were 139 v8 SVR registered for the first time on UK roads.
From Q1 2017 to Q3 2019 there were 249 v8 SVR AWD registered for the first time on UK roads. (No data for 2019 Q4 yet - due end of April)
TOTAL UK REGISTRATIONS = 388