According to StatsCan it is actually a bit more, but varying year-to-year. Pre-Covid it looks like it was closer to 27% or 28%, now closer to 26%. So a lot of room to grow, if we made the assumption that all those dying of cancer would prefer to choose their date of passing. Personally, I think the more immediate source of growth in the number of MAID administrations should come from those who died after requesting MAID but before MAID was able to be administered, which would give an increase of 19% in administrations.

Statistics Canada. Table 13-10-0392-01 Deaths and age-specific mortality rates, by selected grouped causes https://www150.statcan.gc.ca/t1/tbl1/en/tv.action?pid=131003...

https://www.canada.ca/en/health-canada/services/publications...