Does anybody have numbers of fatal crashes pr. million flights, or similar?
Not that I can find.
Too little data?
In terms of airline passenger miles, the SSJ100 seems to account for a tiny proportion of passenger miles in Russia.
Non russian airlines have eliminated or scaled-back use of the SSJ100
According to Time
Mexico’s Interjet said Sunday it operated five of the planes “under the highest safety standards.”
Interjet has previously said it has 22 Superjets but referred in a recent earnings report to the “gradual phase out of the fleet of SSJ100.” The company reported it lost sales after some planes were temporarily out of service after a warning from Russia’s aviation authority about a potential defect in the tail section in December 2016. Interjet also said it was seeking contractual recovery of maintenance costs associated with the plane.
Irish operator CityJet have dropped their leased SSJ100s from their fleet.
The safety issue is probably operator and environment, not planes
The reports I have read suggest that the safety issues are with the operators, regulators and airspace management.
The SSJ100 is now almost exclusively operated by Russian Airlines and Russia's air safety record is allegedly the worst in the world.
The Washington Post reports
“In Russia, there is reliably one big crash with corpses per year,” Mikhail Barabanov, an analyst at the Center for the Analysis of Strategies and Technologies, a Moscow think tank, said in a Facebook post. “According to statistics from international organizations, air traffic safety in the Russian Federation and the CIS in 2018 was the worst in the world — worse than Africa.”