The Wikidata statistics can be bewildering. Above you find a comparison of the last two dumps. You would expect that statements are added and that the number of items with more statements only grow. This time it is not the case. Yes, the total number of statements has gone up but the decrease of the number of items with 6, 7, 8 or 9 statements is more than the increase of the number of items with 10 or more statements.
The good news is that the number of items with no statements has gone down significantly.