Hardly
Jan 2000 - Jan 2001 9.557% Growth
Jan 2001 - Jan 2002 11.404% Growth
Jan 2002 - Jan 2003 6.529% Growth
Jan 2003 Jan 2004 4.130% Growth
For the last 10 years the average m3 growth rate is 7.9% with a peak growth rate of 13 % from 11/00 - 11/01 and a min growth rate of 3.6% from 12/02 - 12/03.
A simple exponential function does not match the data.
No curve matches data, you average out the growth rate it and get a best fit. The fact that growth is measured as a pecentage is a dead giveaway that you have exponential growth, hense as your definition says "grow at a rate proportional to its size".