The Snowbirds have a pool of about 18 aircraft; for an overview enter unit "431sq" in the Scramble database; they usually bring 9 or 10 aircraft to a show, with frequent codes changes during the air show season (monthly and sometimes weekly). The birds are getting really old, so they need this pool to bring the team in the air every week, which makes it very hard to reproduce the 10 aircraft brought to a show during the season.
In July this year I logged the following numbers in Calgary.
Hope this helps.
I am going to another airshow at the end of the month, will try to remember to log the numbers.