The vertical axis indicates the number of employees, but the scale was accidentally omitted from this graph.  What percent of the employees at the Gauss company have worked there for $5$ years or more?

$\text{(A)}\ 9\% \qquad \text{(B)}\ 23\frac{1}{3}\% \qquad \text{(C)}\ 30\% \qquad \text{(D)}\ 42\frac{6}{7}\% \qquad \text{(E)}\ 50\%$
Let $x$ be the amount of people each $\text{X}$ represents.  The percent of people that worked for five or more years is then
\[\frac{2x+2x+2x+x+x+x}{5x+5x+8x+3x+2x+2x+2x+x+x+x}=30\% \rightarrow \boxed{\text{C}}.\]