Use the Table for the Question(s) Below -The Average Annual Return on Westpac from 2003 to 2012

Use the table for the question(s) below.
Consider the following realised annual returns:
$\begin{array} { l c c } \hline \text { Year-end } & \begin{array} { c } \text { All Ords } \\\text { Realised } \\\text { Return }\end{array} & \begin{array} { c } \text { Westpac } \\\text { Realised } \\\text { Return }\end{array} \\\hline 2003& 23.6 \% & 46.3 \% \\\hline 2004 & 24.7 \% & 26.7 \% \\\hline 2005 & 30.5 \% & 86.9 \% \\\hline 2006 & 9.0 \% & 23.1 \% \\\hline 2007 & - 2.0 \% & 0.2 \% \\\hline 2008 & - 17.3 \% & - 3.2 \% \\\hline 2009 & - 24.3 \% & - 27.0 \% \\\hline 2010 & 32.2 \% & 27.9 \% \\\hline 2011 & 4.4 \% & - 5.1 \% \\\hline 2012 & 7.4 \% & - 11.3 \% \\\hline &\end{array}$
-The average annual return on Westpac from 2003 to 2012 is closest to?

A) 18.7%
B) 29.9%
C) 16.40%
D) 18.2%