Income generated from household capital is small for all except the top decile where its contribution rose from 4% in 1993 to 11% in 2008. Table 2.1 shows trends in household structure by decile.6 The percentage of single adult households is highest at the extreme ends of the income spectrum. While the number in the bottom decile is inflated by the zero incomes, the same basic trend is observed in the tables where zeroes are excluded. It makes some sense that many of the wealthiest households are in fact single professionals living alone. This would explain a fairly high proportion of wealthy households being single adult households.