According to the Regression Analysis Output Below, How Much of the Variability

According to the regression analysis output below, how much of the variability in tourism revenue is accounted for by the number of foreign visitors? Regression Analysis: Tourism (\$bill) versus visitors (mill) The regression equation is: Tourism (\$ bill) $= 21.5 + 0.295$ visitors (mill)
$\begin{array} { l r r } \text { Predictor } & \text { Coef } & \text { SE Coef } \\ \text { Constant } & 21.464 & 3.462 \\ \text { Visitors (mill) } & 0.29497 & 0.07917 \end{array}$
$$S = 2.58307 \quad \mathrm { R } - \mathrm { Sq } = 63.4 \%$$

A) 63.4 %
B) 13.8 %
C) 2.58 billion $
D) 21.464 %
E) 3.73 billion $