OPM has, however, released the 2017 list for national and international charities, so we have precise figures.
Comparing the 2016 list with the 2017 list, we see that the overall number of participating charities dropped by 21 percent. The actual numbers:
2016 national and international charities: 2,603
2017 national and international charities: 2,057
Reduction: - 546
Most federations, following the general trend, saw their memberships decline. Some federations dropped out. One federation came into existence, and a handful of federations maintained their membership.
Below are the numbers for every national and international federation. We treated independent charities as their own federation.