Here are counts year-by-year of my mtDNA full scan matches. I’m mtDNA Haplogroup H, the most common in the UK. To be precise, it’s H1bb
The peak from 2016 to 2018 matches that for Y-DNA tests. Data for 2022 is to 10 September.
My six exact matches were in 2022, 2021, 2019, 2017, 2014 and 2010. Partial matches, with mismatches at 1,2 and 3 bases, were in all years reported.
As with Y-DNA, FTDNA can alert you to significant mtDNA matches.