The -3.2% figure is the decline in number of US congregations, not KHs, although we can assume there is a relationship between the two numbers.
The Memorial attendance is pretty good most places, except the US where there was a small decline.
Nearly 1 million attended the Memorial in Zambia, out of a population of 17.9 million. Imagine being in a country where more than 1 in 20 people attend the KH in the night of the Memorial. The place must be buzzing. Considering JWs are non-political, in Zambia one wonders if there is much discussion about the level of JW adherence in the country and possible implications for democracy and governance.
While it's true that the number of JWs is declining in most of Eastern Europe, it’s worth bearing in mind that many of these countries also have declining populations.
But not Poland, where JWs have expericed sustained decline for years now.