IIRC the Flynn effect has been in reverse since the mid 90's. Here's a quote from Wikipedia:

"Research suggests that there is an ongoing reversed Flynn effect, i.e. a decline in IQ scores, in Norway, Denmark, Australia, Britain, the Netherlands, Sweden, Finland, France and German-speaking countries, a development which appears to have started in the 1990s".

In my country, Australia, we saw zero improvement on the Colored Porgressive Matrices from 1975-2003, and a decline since then.