What Was the Unemployment Rate in 2006 in Table 6

What was the unemployment rate in 2006 in Table 6.1? Table 6.1
$\begin{array}{|l|r|r|r|}\hline& 2004 & 2005 & 2006 \\\hline \text { Working Age Population } & 200 \text { million } & 225 \text { million } & 275 \text { million } \\\hline \text { Labor Force } & 150 \text { million } & 165 \text { million } & 200 \text { million } \\\hline\text { Unemployed } & 5 \text { million } & 15 \text { million } & 35 \text { million } \\ \hline\end{array}$

A) 12.7 percent.
B) 72.7 percent.
C) 51.6 percent.
D) 17.5 percent.