Average % capital growth over 15 years- how work it out

I was wondering what's the easiest way to work out the average percentage capital growth over a 15 year period for a suburb

eg from 2000- 2014 (15 years)
yr 2000 = $129K
yr 2014 = $550k

Specifics for the years are:
2000 $129,000 1.60%
2001 $149,998 16.30%
2002 $205,000 36.70%
2003 $263,250 28.40%
2004 $308,500 17.20%
2005 $307,500 -0.30%
2006 $330,000 7.30%
2007 $420,800 27.50%
2008 $427,000 1.50%
2009 $450,000 5.40%
2010 $468,500 4.10%
2011 $490,000 4.60%
2012 $453,350 -7.50%
2013 $485,000 7.00%
2014 $550,000 13.40%

 

10^(log (550/129) / 15) - 1 = 10.15%

 

And what does that prove? If there is a loan the change in debt also factors in as does the net cash flows in each year. Allow for taxes?