|   Income levels  |       2007  |       2008  |       2009  |       2010  |       2011  |       2012  |    
|   Poor households  |       3357.9  |       3734.4  |       4197.6  |       4739.2  |       5398.2  |       6520  |    
|   Lowest income households  |       4210.1  |       4753.6  |       5253.2  |       5948.1  |       6876.1  |       8215.1  |    
|   Lower income households  |       6504.6  |       7363.3  |       8162.1  |       9285.3  |       10,672  |       12488.6  |    
|   Lower middle income households  |       8900.5  |       10195.6  |       11243.6  |       12702.1  |       14498.3  |       16761.4  |    
|   Middle income households  |       12042.3  |       13984.2  |       15399.9  |       17224  |       19544.9  |       22419.1  |    
|   Upper middle income households  |       16385.8  |       19254.1  |       21018.0  |       23188.9  |       26,420  |       29813.7  |    
|   Higher income households  |       22233.6  |       26250.1  |       28386.5  |       31,044  |       35579.2  |       39605.2  |    
|   Highest income households  |       36784.5  |       43613.8  |       46826.1  |       51431.6  |       58841.9  |       63824.2  |