The levels of motor vehicle traffic and the percentage changes each year from 1997 to 2005 are given in the following table.
Billion vehicle kilometres and percentage change All motor vehicles Percentage change from previous year 1997 450.3 2.1 1998 458.5 1.8 1999 467.0 1.8 2000 467.1 0.0 2001 474.4 1.6 2002 486.5 2.5 2003 490.4 0.8 2004 498.6 1.7 2005 499.4 0.2
It is not possible to estimate the proportion of the change attributable to each income quintile or according to the classification of residential neighbourhoods.