I'm not sure there was necessarily a jump. There has generally been a decline in the number of net benefit reviews over time, because the thresholds have risen. I believe the CBA brief cited nine cases reviewed in the annual report for that fiscal year. Interestingly, however, there has been an increase in the number of national security reviews, so I think you'll find an equal number of both in the annual report.
On June 18th, 2020. See this statement in context.