My suspicion is that a big part of this is declining family size among all income brackets. The reported numbers are per household rather than per child (exclud

My suspicion is that a big part of this is declining family size among all income brackets. The reported numbers are per household rather than per child (excluding households with no children). Amount spent per child might be flat or even still even be slightly rising for these groups (though obviously nothing like the booming spending of the wealthy).